LKM KALOR LEBUR ES
LEMBAR KERJA MAHASISWA DI LABORATORIUM (LKM)
MODUL VII
KALOR LEBUR ES
Nama
:
No. Stambuk
:
Tanggal Percobaan
:
Kelompok
:
Tanda tangan Mahasiswa
:
Nama Asisten
:
Tanda tangan Asisten
:
Penilaian Asisten
:
1. Hasil Pengamatan
m1 = m2 = massa es = …..
m3 = massa kalorimeter + pengaduk = …..
m4 = massa air = …..
mgelas
=…
suhu kamar = ….
NST termometer = …..
NST neraca = …..
T1 = ….
T2 = ....
C1 = C2 = kalor jenis es = …..
C3 = kalor jenis kalorimeter = ….
C4 = kalor jenis air = …..
2. Menentukan besarnya Kalor Lebur Es
L
=
=
=
m3 C3 ( T 1−T 2) + m4 C 4 ( T 1−T 2 )−m2 C 2 T 2
m1
PERTANYAAN-PERTANYAAN
1. Jelaskan definisi dari kalor lebur es!
Jawab :
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
2. Mengapa pada percobaan ini harus digunakan kalorimeter?
Jawab :
................................................................................................................................................................ B
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
3. Hitunglah ketelitian (ΔL) dari perhitungan kalor lebur es!
Jawab :
c 4 ( T 1−T 2 )
c 3 ( T 1 −T 2 )
c2T 2
∆ L=
∆ m 4|+
∆ m 3|+
|
|
|∆ m 2|+¿
m1
m1
m1
|
|
| |
| | |
m3 C 3 ( T 1−T 2 ) +m4 C4 ( T 1−T 2 )−m2 C2 T 2
m
2
1
| |
|∆ m1|+
| |
|
m 3 C 3+ m 4 C 4
m C +m C +m C
∆T 1|+ 3 3 4 4 2 2 |∆ T 2|
|
m1
m1
dengan
∆ m4 =∆ m 3=∆ m2 =∆ m1=NST Neraca digital = ………. Gram
1
∆ T 2=∆ T 1= NST Termometer = …… oC
2
Maka,
∆ L=¿
KTPm = ΔL = ……
∆L
x 100 = x 100 =…
KTPr =
L
∆L
… …..
¿ = 1 – log (
¿ = 1 – log (………….) = 1 - ………….. = ………. AB
AB = 1 – log (
L
… …..
Pelaporan = (L ± ∆ L¿ = …………… ± ……………..
4. Bandingkan hasil perhitungan Anda dengan kalor lebur es yang ada di dalam literatur. Berilah
pembahasan tentang sumber-sumber kesalahannya
Jawab :
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
5. Tuliskan bunyi asas black
Jawab :
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
6. Dalam percobaan ini, jelaskan apa yang dimaksud dengan kalor yang diterima dan kalor yang
dilepaskan
Jawab :
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
7. Yang manakah benda yang melepas kalor dan benda yang menerima kalor? Jelaksan alasanmu!
Jawab :
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
Kesimpulan :
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
MODUL VII
KALOR LEBUR ES
Nama
:
No. Stambuk
:
Tanggal Percobaan
:
Kelompok
:
Tanda tangan Mahasiswa
:
Nama Asisten
:
Tanda tangan Asisten
:
Penilaian Asisten
:
1. Hasil Pengamatan
m1 = m2 = massa es = …..
m3 = massa kalorimeter + pengaduk = …..
m4 = massa air = …..
mgelas
=…
suhu kamar = ….
NST termometer = …..
NST neraca = …..
T1 = ….
T2 = ....
C1 = C2 = kalor jenis es = …..
C3 = kalor jenis kalorimeter = ….
C4 = kalor jenis air = …..
2. Menentukan besarnya Kalor Lebur Es
L
=
=
=
m3 C3 ( T 1−T 2) + m4 C 4 ( T 1−T 2 )−m2 C 2 T 2
m1
PERTANYAAN-PERTANYAAN
1. Jelaskan definisi dari kalor lebur es!
Jawab :
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
2. Mengapa pada percobaan ini harus digunakan kalorimeter?
Jawab :
................................................................................................................................................................ B
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
3. Hitunglah ketelitian (ΔL) dari perhitungan kalor lebur es!
Jawab :
c 4 ( T 1−T 2 )
c 3 ( T 1 −T 2 )
c2T 2
∆ L=
∆ m 4|+
∆ m 3|+
|
|
|∆ m 2|+¿
m1
m1
m1
|
|
| |
| | |
m3 C 3 ( T 1−T 2 ) +m4 C4 ( T 1−T 2 )−m2 C2 T 2
m
2
1
| |
|∆ m1|+
| |
|
m 3 C 3+ m 4 C 4
m C +m C +m C
∆T 1|+ 3 3 4 4 2 2 |∆ T 2|
|
m1
m1
dengan
∆ m4 =∆ m 3=∆ m2 =∆ m1=NST Neraca digital = ………. Gram
1
∆ T 2=∆ T 1= NST Termometer = …… oC
2
Maka,
∆ L=¿
KTPm = ΔL = ……
∆L
x 100 = x 100 =…
KTPr =
L
∆L
… …..
¿ = 1 – log (
¿ = 1 – log (………….) = 1 - ………….. = ………. AB
AB = 1 – log (
L
… …..
Pelaporan = (L ± ∆ L¿ = …………… ± ……………..
4. Bandingkan hasil perhitungan Anda dengan kalor lebur es yang ada di dalam literatur. Berilah
pembahasan tentang sumber-sumber kesalahannya
Jawab :
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
5. Tuliskan bunyi asas black
Jawab :
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
6. Dalam percobaan ini, jelaskan apa yang dimaksud dengan kalor yang diterima dan kalor yang
dilepaskan
Jawab :
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
7. Yang manakah benda yang melepas kalor dan benda yang menerima kalor? Jelaksan alasanmu!
Jawab :
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
................................................................................................................................................................
Kesimpulan :
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................
..............................................................................................................................................................................