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Question

Chemistry Question on Enthalpy change

The equilibrium constant for a reaction is 1010. What will be the value of GΘ∆G^Θ?
R=8.314 JK1mol1,T=300 KR= 8.314\ JK^{-1} mol^{-1}, T=300\ K

Answer

From the expression,
GΘ=2.303RT log Keq∆G^Θ = –2.303 RT\ log\ K_{eq}
GΘ∆G^Θ for the reaction,
= (2.303)(8.314 JK1mol1)(300 K)log 10(2.303) (8.314\ JK^{–1} mol^{–1}) (300\ K) log\ 10
= 5744.14 Jmol1–5744.14\ Jmol^{–1}
= 5.744 kJmol1–5.744\ kJ mol^{–1}