Page 120 - Modeling of Chemical Kinetics and Reactor Design

90 Modeling of Chemical Kinetics and Reactor Design

×
×
∆H ( 623)= ∆H ( 298)+ 623  ∆aT + ∆b 10 − 2 T 2 + ∆c 10 − 5 T 3

o
rxn
rxn
298 2 3
×
4

+ ∆d 10 − 9 T 
4 
2 23751 ×10 −2 (623 2 − 298 2 )
.
{
.
,
=−21 664 + −16 08 (623 − 298 )+
2
0 61056 ×10 −5 (623 3 − 298 3 ) 0 9735. ×10 −9 (623 4 −298 4 )
.
− − }
3 4
−
−
+
.
=− 21 664 5 226 3 348 71 438 26 − 34 74
.
.
,
,
,
cal
,
.
=−24 014 29
mol A
Table 2-3
The standard heat of a chemical reaction calculation:
aA + bB → cC + dD