Teori Kinetik Gas
167
1.-4?-.:3C-:3A;891:C-85?1=919585758.-:3C-:3919:375:7-:0-=- 718-= 0-=5 ?-.:3 8-98- 4 0-=- 0-8-9 ?-.:3 -0-8-4 E -.:3
05-:-7-:45:33-4:C-91:6-05E1:?7-:1=.-:05:3-:-:?-=-9-- 3-C-:3718-=0-=5?-.:30-:9---B-8:C-
7 -.:3.;;=145:33-?17-:-:?50-7.1=.-47;:?-:9175:05-:-7-:
01:3-:91:33:-7-:1=-9--: -?-
-8-94-85:5 7;:?-:145:33-
57-0595-87-:9---B-83- 0-:9---745=3-0-8-9?-.:3-0-8-4
0--?05?85 -?-
8147-=1:-9--3-C-:3?1=5- .1=-=?5?18-4718-=3-1.-:C-7
C-5? F
1:3-:019575-:1=.-:05:3-:-:?-=-9--3-C-:3718-=0-:9--3--B-8:C- -0-8-4
-?9;83-91:19-?5A;891
09 43-
-0---?5?E1:?7-:8-4?17-:-:3-?1=1.? -? 85?1= 3- -0- ?17-:-: -?9;21= 91958575
?191=-?=E1=--7-4?17-:-:3-?1=1.?657- A;891:C-05.-491:6-05
85?1=0-:?191=-?=
:C-91:6-05E
1=--7-4A;8913=-93-41859-0-4E 0-:?17-:-:
993
=
73 79;8
Tes Kompetensi Subbab
A
2+,--.5,5-4 1.-4?-:3750-=-C-:3.1=55
730-=--0-?17-:-:
-?90559-:05?19-?C-:3.1=4E-0---? 055:0-47-: 71 .1:3718 C-:3 .1=4
E 7-?
1:3-9-:-0-?-:375919.1.-7-:1698-40-=- 57-7-?.171=6-71?57-0-=-0-8-9?-.:39181.545
-?9?1:?7-:9--0-=-C-:305.1.-7-:
B. Prinsip Ekuipartisi Energi
-0-.-4--:1.189:C-?18-405618-7-:.-4B-1?5--=?57183- 501-8 18-8 .1=31=-7 145:33- 91:34-587-: 1:1=35 75:1?57 814 7-=1:-
52-? 3- 501-8 05?5:6- 1-=- 7118=4-: 1:1=35 75:1?57 1?5- -=?5718 :C- 91=-7-: 1:1=35 75:1?57 =-?-=-?- -8 ?1=1.? 91:C1.-.7-:
?59.8:C- =5:5 175-=?55 1:1=35
Kata Kunci
• gas ideal • jumlah mol
Contoh
7.3
1:3-:91:33:-7-:23.9051=;814
-?9
-?9 -05?17-:-:3-?1=1.?-0-8-4-?9
Mudah dan Aktif Belajar Fisika untuk Kelas XI
168
1. Tekanan Gas dalam Ruang Tertutup
1=4-?57-: .2
-? 3- 501-8 ?1=7=:3 0-8-9 1.-4 7. C-:3 91958575 -:6-:3 =7 1.-4 -=?5718 0-=5 3- 501-8
?1=1.? .1=31=-7 0-8-9 -=-4 9.- 01:3-: 711-?-: 0-:
918-77-: 31=-7 .;8-7.-857 0-=5 05:05:3 71 05:05:3 71905-: 719.-858-357105:05:3-=-7C-:305?194-=?5718?1=1.?-0-8-4
11-?-:18-9-.1=31=-718-8-9-7-=1:-?9.7-:C-:3?1=6-05 -:?-=-=?5718 0-: 05:05:3 05-957-: 1.-3-5 ?9.7-: 81:?5:3 19
=:- ,-7? ?194 -0- 31=-7 .;8-7.-857 ?1=1.? -0-8-4 10-:37-: .-:C-7:C- ?9.7-: 1= -?-: B-7? C-:3 05.-? ;814
-=?5718 0-: 05:05:3 -0-8-4 0-: 1=.-4-: 9;91:?9 C-:3
05-8-95 9;8178 0--? 05?857-: 1.-3-5 .1=57? 1=.-4-:9;91:?99;91:?9-745=F9;91:?9-B-8
1 F 6
F 6
1
F 6
F -:0- :13-?52 -0- 9;91:?9 -745= -=?5718 91::677-: -=-4
31=-7-=?57181?18-4?9.7-:C-:3.1=8-B-:-:-=-401:3-:-=-431=-7 -B-8:C- -=5 1=-9--: 1=.-4-: 9;91:?9 ?1=1.? 0--? 05-=5
3-C- C-:3 .171=6- -0- -=?5718 C-5? 1=.-4-: 9;91:?9 C-:3 055:0-47-: ;814 -=?5718 71 05:05:3 1= -?-: B-7?
1 6
6
F -0- 71:C-?--::C- -=?5718 C-:3 91:9.7 05:05:3 ?50-7 4-:C-
-? -=?5718 ?1?-5 1698-4 -=?5718 814 7-=1:- 5? 3-C- C-:3 05?1=59- 05:05:3 -75.-? ?9.7-: -=?5718 -0-8-4
6
F -:0-:13-?52-0-23.9
4-:C-91::677-:-=-43-C-:C-
-6-57-:0-4-:C-5:35:91:31?-45.1-=:C-?-:0-:13-?52?1=1.?0--? 05458-:37-: +:?7 91:31?-45 ?17-:-: C-:3 05-8-95 05:05:3 ?-.:3
1=-9--: ?1=1.? 05.-35 01:3-: 8- 1=97--: 7. -8 ?1=1.? 057-=1:-7-: ?17-:-: 91=-7-: 1=.-4-: 9;91:?9 C-:3 055:0-47-:
;8141698-4-=?57187105:05:31=-?-:B-7?:?71?5--?-:8-
1 6
814 7-=1:- A;891 -7-: 050--?7-: 1=-9--:
1
6
F -0-8-4 ?17-:-: -0- 05:05:3 :?7 9.- 1:3-: -=- C-:3
-9- ?17-:-: 3- -0- 05:05:3 ?13-7 C-:3 1-=-4 9.- 0-: 9.- 05=97-: 1.-3-5 .1=57?
Tantangan
untuk Anda
Pernahkah Anda minum minuman bersoda? Ketika Anda membuka
tutup botolnya, akan terbentuk kabut tipis di sekitar tutup botol
tersebut. Mengapa hal ini terjadi?
Sumber: Fundamentals of Physics, 2001
y
dinding A v
x
m
z x
dinding B
Gambar 7.5
Tanda panah menyatakan momentum sebuah molekul setelah
menumbuk dinding.
Teori Kinetik Gas
169
1 6
0-:1
D
6
+:?7 91:31?-45 =18?-: 0-=5 ?17-:-: 4-= 05-=5 ?1=81.54 0-48 =18?-: 711-?-::C- 1:=? 7-50-4 A17?;= .1-= =18?-:
711-?-: -0-8-4 1.-3-5 .1=57? 01:3-:
9-7- 1:3-: 019575-: 1=-9--: ?17-:-: 3- -0- =-:3 ?1=??
-0-8-4 F
1?1=-:3-: ?17-:-:3- 9
-?- - 9-- -=?5718 73
698-4 -=?5718 711-?-: 31=-7 -=?5718 9
A;8913-9
1=-9--:?17-:-:3-0-8-9=-:3?1=??05-?-0--?05:C-?-7-: 0-8-9 .1:?7 1:1=35 75:1?57 =-?-=-?-
0-=5 -=?5718 3- C-5?
E v
v
-05 F
1?1=-:3-: 1:1=35 75:1?57 =-?-=-?- -? -=?5718 3- 6;81
57-711-?-:-=?57183-91:6-050-7-85711-?-:198-?1:?7-:8-4.1-=:C- ?17-:-:C-:3054-587-:
7 .:3-:?17-:-:?1=4-0-718-6-:-0-8-4
8147-=1:-:58-5 7;:?-::58-51.-:05:301:3-:
145:33-
-05?17-:-:3-91:6-0519-?7-85?17-:-:198-
1.-4?-.:301:3-:A;891
9 91:3-:0:39;81859-0-4E
1:3-:91:3-:33-18591.-3-53-501-8?1:?7-: -
1:1=3575:1?573-1859 .
1:1=3575:1?57=-?-=-?-1?5-9;83-1859?1=1.? 7
- 571?-45
A;891?-.:3
9 9;8
Contoh
7.4
Contoh
7.5
