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perhitungan entalpi
entalpiFull description...
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Fita Desti Senja
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("be 1. /"t" #$ 0 &"n #'0 p"&" on&i%i %t"n&"r 298 K #$ 298 +mo
Komponen *$3
#' 298 +mo
-46.11
-16.45
*$2S4
-813.989
-690.003
**$42S4 "
-1174.28
-903.14
Sumber :
*Smith, 2001 ; **Perr, 2008
Perhitun!"n #$ %t"n&"r &"n #' %t"n&"r p"&" ( ) #$ 298 ) #$ 298 pro&u - #$ 298 re"t"n )
298 K -268.071 -268.071 +mo +mo
#' 298 ) #'298 pro&u - #' 298 re"t"n ) (re"%i )
-229.587 -229.587 +mo +mo
378 K ) 105 105
("be 2. /"t" p m"%in!-m"%in! omponen Komponen *$3
33.573
*$2S4
/
-0.012581 0.000088906 -7.1783-008 1.8569-011
9.486
0.33795
0
0
**$42S4 Sumber :
0.00038078 2.1308-007 -4.6878-011 0
0
0
*"%, 1996 ; **
Perhitun!"n #$ re"%i &"n #' re"%i : T ".
∆ H R = ∆ H f
+
298
∫ ∆Cp ⋅ dT
To
+ ∫ Cpammonium sulfat ⋅ d T − 2 ∫ Cpamonia ⋅ d T + 378
∆ H R = ∆ H f
298
378
298
∆$ )
b.
∆G R = ∆ H f ∆' )
298
-303.4632012807
298
−
T To
( ∆ H
f
Cpasam sulfat ⋅ dT
∫
298
+mo T
298
378
− ∆G
-70334.1269391901 -70334.1269391901 +mo
298
∆Cp
) R ∫ To
R
T
dT − RT
∆Cp
dT
R
T
∫
To
p +mo.K *p ) < ( < (2 < /(3< (4
0.0380227178 0.2021898991 0
&im"n" )
0.008314 +mo.K
Perhitun!"n p, #$ %t"n&"r, &"n #' %t"n&"r ("be 1. /"t" #$ 0 &"n #'0 p"&" on&i%i %t"n&"r 298 K #$ 298 +mo
Komponen
#' 298 +mo
*$3 !
-46.11
-16.45
*$2
285.83
237.129
*S2 !
-296.83
-300.194
0
0
-900.4
-645
*2 ! **$42S3 **$42S4
-1174.28 *Smith, 2001 ; **"!m"n, 1982
Sumber :
-903.14
e"%i 1 :
2NH3 (g) + SO2 (g) + H2O (l)
==> (NH4)2 SO3 (aq)
e"%i 2 :
(NH4)2 SO3 (aq) + 1/2 O2 (g)
==> (NH4)2 SO4 (aq)
Perhitun!"n #$ %t"n&"r &"n #' %t"n&"r p"&" ( )
298 K
". e"%i 1 #$ 298 ) #$ 298 pro&u - #$ 298 re"t"n )
-797.18 +mo
#' 298 ) #'298 pro&u - #' 298 re"t"n )
-549.035 +mo
b. e"%i 2 #$ 298 ) #$ 298 pro&u - #$ 298 re"t"n )
-273.88 +mo
#' 298 ) #'298 pro&u - #' 298 re"t"n )
-258.14 +mo
(re"%i )
378 K ) 105
("be 2. /"t" p m"%in!-m"%in! omponen Komponen *$3 33.573
/
-0.012581 0.000088906 -7.1783-008
*$2
92.053
-0.039953 -0.00021103 5.3469-007
*S2 !
29.637
0.034735 9.2903-006 -2.9885-008
*2 !
29.526
-0.0088999 0.000038083 -3.2629-008
**$42S3 **$42S4 Sumber :
*"%, 1997 ; **
Perhitun!"n #$ re"%i &"n #' re"%i : T ". ∆ H R = ∆ H f + ∫ ∆Cp ⋅ dT 298
To
+ ∫ Cpammonium sulfat ⋅ dT − 2 ∫ Cpamonia ⋅ dT + 378
∆ H R = ∆ H f
298
378
378
∫ Cp
asam sulfat
⋅ d
298
b.
298
∆$ 1 )
-812.7340431358
+mo
∆$ 2 )
-276.2817512427
+mo
∆G R = ∆ H f
298
∆' )
−
T To
( ∆ H
f
T
298
− ∆G
298
∆Cp
) R ∫ To
+mo
298
R
T
dT − RT
∆Cp
∫
To
R
d T
Perhitun!"n p, #$ re"%i, &"n #' re"%i (re"%i )
378 K
p +mo.K
1.8569-011
0.0380227178
0
0.0756766437
1.0937-011
0.0427034598
8.8607-012
0.0300218905 0 0
*p ) < ( < (2 <
&im"n" )
0.008314 +mo.K
(3< (4
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