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Question

In the preparation of CaO from CaCO3 using the equilibrium CaCO3(s)CaO(s)+CO2(g)Kp is expressed as log Kp=7.2828500T for the complete decomposition of CaCO3, the temperature in Celsius to be used is

A
1167
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B
894
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C
8500
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D
850
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Solution

The correct option is B 894
For complete decomposition, Kp=1
log 1=7.282=8500T
i.e., 7.282=8500T,(log 1=0)
or, T=85007.282=1167 K
=1167273C=894C

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