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Question

For a given reaction:
C(s)+O2(g)Co(g)+H2(g) at 25oC ΔH=131kJ/mol
Given: Kp = 9.36×1017
Calculate the value of reaction constant at 700oC.

A
0.915
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B
0.214
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C
0.583
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D
0.797
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Solution

The correct option is D 0.797
As per van't hoff equation,
logK2K1=ΔH2.303R×1T11T2
Given: K1 =9.36×1017
ΔH=131 kJ/mole T1=298K T2=973K
put up the values in equation, we get
logK29.36×1017=1312.303R×12981973
On solving,
K2=0.797

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