   Chapter 18, Problem 69GQ

Chapter
Section
Textbook Problem

The equilibrium constant, Kp, for N2O4(g) ⇄ 2 NO2(g) is 0.14 at 25 °C. Calculate ΔrG° for the conversion of N2O4(g) to NO2(g) from this constant, and compare this value with that determined from the ΔfG° values in Appendix L.

Interpretation Introduction

Interpretation:

The value of ΔrG for the given process of conversing N2O4(g) to NO2(g) should be calculated.

Concept introduction:

The Gibbs free energy or the free energy change is a thermodynamic quantity represented by ΔrG. It is related to the equilibrium constant K by the equation,

ΔrG=RTlnK

Explanation

The ΔrG value for thegiven process of conversion of N2O4(g) to NO2(g) is calculated below.

For the process of conversion of N2O4(g) to NO2(g)  value of equilibrium constant K is 0.14 at 25 C

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