Q.

For the reaction CaCO3(s)CaO(s)+CO2(g), Kn=1.16atm at 1160K if 20g of CaCO3 in 10.0L  vessel at 1160 K, is taken the fraction of CaCO3 dissociated is 

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a

0.75

b

0.52

c

0.61

d

0.71

answer is B.

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Detailed Solution

Kp=1.16 atm implies pCO2=1.16atm 

The amount of CO2 is n=pVRT=(1.16atm)(10L)0.082L atm K1mol1(1160K) =18.2mol

Mass of CaCO3 dissociated, m=nM=18.2mol100gmol1=12.2g

Fraction of CaCO3 dissociated =12.2g20g=0.61

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For the reaction CaCO3(s)⇌CaO(s)+CO2(g), Kn=1.16atm at 1160K if 20g of CaCO3 in 10.0L  vessel at 1160 K, is taken the fraction of CaCO3 dissociated is