TONI RIZKI ARUAN 080405010
UNIVERSITAS SUMATERA UTARA
Total ΔHr = -30.786.359,77 kJjam
b.2 Panas reaksi gas alam
1. Pembakaran gas alam CH
4
CH
4
+ 2O
2
CO
2
+ 2H
2
O Tabel LB.13 Panas Reaksi Standar 298,15K
Senyawa Δ
Koefisien Reaksi
ΔH
f 298,15 K
kJkmol ΔH produk
298,15 K
kJkmol ΔH reaktan
298,15 K
kJkmol CH
4
1 -74.850
- -74.850
O
2
2 0,0
- 0,0
CO
2
1 -393.500
-393.500 -
H
2
O 2
-285.840 -571.680
-
r
1
=
N
CH 4 x
X CH
4
σ
r
1
=
22,3540x 1 1
= 22,3540 kmoljam Panas reaksi pada suhu standar reaksi :
ΔH
r298,15 K
= ΔH
f 298,15 K
Produk
- ΔH
f 298,15 K
Reaktan
= -393.500-571.680 – -74.850 kJkmol
= -965.180 + 74.850 kJkmol = -890.330 kJkmol
Panas reaksi total H
r tot
: H
r tot
= r
1
x H
r 298,15K
= 22,3540 kmoljam x -890.330 kJkmol
= -19.902.472,02 kJjam
Universitas Sumatera Utara
TONI RIZKI ARUAN 080405010
UNIVERSITAS SUMATERA UTARA
2. Pembakaran gas alam C
2
H
6
C
2
H
6
+ 72O
2
2CO
2
+ 3H
2
O Tabel LB.14 Panas Reaksi Standar 298,15K
Senyawa Δ
Koefisien Reaksi
ΔH
f 298,15 K
kJkmol ΔH produk
298,15 K
kJkmol ΔH reaktan
298,15 K
kJkmol C
2
H
6
1 -83.800
- -83.800
O
2
72 0,0
- 0,0
CO
2
2 -393.500
-787.000 -
H
2
O 3
-285.840 -857.520
-
r
1
=
N
C 2H 6 x
X C
2
H
6
σ
r
1
=
1,6393 x 1 1
= 1,6393 kmoljam Panas reaksi pada suhu standar reaksi :
ΔH
r298,15 K
= ΔH
f 298,15 K
Produk
- ΔH
f 298,15 K
Reaktan
= -787.000-857.520 – -83.800 kJkmol
= -1.644.520 + 83.800 kJkmol = -1.560.720 kJkmol
Panas reaksi total H
r tot
: H
r tot
= r
1
x H
r 298,15K
= 1,6393 kmoljam x -1.560.720 kJkmol
= -2.558.482,42 kJjam 3.
Pembakaran gas alam C
3
H
8
C
3
H
8
+ 5O
2
3CO
2
+ 4H
2
O Tabel LB.15 Panas Reaksi Standar 298,15K
Senyawa Δ
Koefisien Reaksi
ΔH
f 298,15 K
kJkmol ΔH produk
298,15 K
kJkmol ΔH reaktan
298,15 K
kJkmol C
3
H
8
1 -104.700
- -104.700
O
2
5 0,0
- 0,0
CO
2
3 -393.500
-1.180.500 -
H
2
O 4
-285.840 -1.143.360
-
r
1
=
N
C 3H 8 x
X C
3
H
8
σ
Universitas Sumatera Utara
TONI RIZKI ARUAN 080405010
UNIVERSITAS SUMATERA UTARA
r
1
=
1,0134 x 1 1
= 1,0134 kmoljam Panas reaksi pada suhu standar reaksi :
ΔH
r298,15 K
= ΔH
f 298,15 K
Produk
- ΔH
f 298,15 K
Reaktan
= -1.143.360-1.180.500 – -104.700 kJkmol
= -2.323.860 + 104.700 kJkmol = -2.219.160 kJkmol
Panas reaksi total H
r tot
: H
r tot
= r
1
x H
r 298,15K
= 1,0134 kmoljam x -2.219.160 kJkmol = -2.248.859,30 kJjam
4. Pembakaran gas alam C
5
H
12
C
5
H
12
+ 8O
2
5CO
2
+ 6H
2
O Tabel LB.16 Panas Reaksi Standar 298,15K
Senyawa Δ
Koefisien Reaksi
ΔH
f 298,15 K
kJkmol ΔH produk
298,15 K
kJkmol ΔH reaktan
298,15 K
kJkmol C
5
H
12
1 -146.800
- -146.800
O
2
8 0,0
- 0,0
CO
2
5 -393.500
-1.967.500 -
H
2
O 6
-285.840 -1.715.040
-
r
1
=
N
C 5H 12 x
X C
5
H
12
σ
r
1
=
0,2384x 1 1
= 0,2384 kmoljam Panas reaksi pada suhu standar reaksi :
ΔH
r298,15 K
= ΔH
f 298,15 K
Produk
- ΔH
f 298,15 K
Reaktan
= -1.967.500-1.715.040 – -146.800 kJkmol
= -3.682.540 + 146.800 kJkmol = -3.535.740 kJkmol
Panas reaksi total H
r tot
: H
r tot
= r
1
x H
r 298,15K
Universitas Sumatera Utara
TONI RIZKI ARUAN 080405010
UNIVERSITAS SUMATERA UTARA
= 0,2384 kmoljam x -3.535.470 kJkmol = -843.008,39 kJjam
Total ΔHr = -25.552.822,1 kJjam Total keseluruhan ΔHr = -56.339.178,61 kJjam
c. Panas keluar
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