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Question

For the chemical equilibrium,
CaCO3(s)CaO(s)+CO2(g)
ΔHof can be determined from which one of the following plots?

A
.
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B
.
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C
.
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D
.
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Solution

The correct option is A .
CaCO3(s)CaO(s)+CO2(g)
Kp=Pco2
logKp=logAΔHor2.303RT
logPco2=logAΔHor2.303RIT ...... (i)
Graph (a) represents (i) and its slope will be used to determine the heat of the reaction.

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