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For the reaction CO(2)(g)+H(2)(g) hArr...

For the reaction
`CO_(2)(g)+H_(2)(g) hArr CO(g)+H_(2)O(g)`
K is `0.63` at `700^(@)C` and `1.66` at `1000^(@)C`.
a. What is the average `DeltaH^(ɵ)` for the temperature range considered?
b. What is the value of K at `800^(@)C`?

A

3 Kcal

B

5 Kcal

C

6 Kcal

D

8 Kcal

Text Solution

Verified by Experts

The correct Answer is:
D
`T_(1)=700+273=973K`
`T_(2)=1000+273=1273K`
`K_(1)=0.63, K_(2)=1.66`
Using the Vant' Hoff equation: `"log"(K_(2))/(K_(1))=(DeltaH)/(2.303R)[(T_(2)-T_(1))/(T_(1)T_(2))]`
`rArr "log"(1.66)/(0.63)=(DeltaH)/(2.303xx2)[(1273-973)/(1273xx973)] rArr Delta H=8.0xx10^(3)cal= 8.0 Kcal`
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