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Calculate the equilibrium constant (in m...

Calculate the equilibrium constant (in multiples of `10^(-4)`) for the reaction `PCl_(5(g)) rarr PCl_(3(g)) + Cl_(2(g))` at 400K, if `Delta H^(0) = 77.2KJ "mole"^(-1) and Delta S^(0) = 122JK^(-1) "mole"^(-1)`

Text Solution

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The correct Answer is:
2
`Delta G^(0) = Delta H^(0) - T Delta S^(0)`
`= 77.2 - (400 xx 122)/(1000) = 28.4 KJ`
`Delta G^(0) = -RT ln K rArr K = 2 xx 10^(-4)`
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