Question

What are the following statements are true and why? a) The reaction is endothermic b) The reaction probably takes place with a small variation of entropy c) ΔG °> 0 for the reaction d) When the equilibrium is reached at 25 ° C a very small amount has been formed

reaction: $N_{2(g))}+O_{2(g))}\rightleftharpoons 2NO_{(g))}$

with kp= $6x10^{-24}$ at 25° C and Kp= $1x10^{-1}$ at 2000°C

Answer 1

ΔGº=−RTlnKeq

Where Kp=Keq= at 25° C and Kp=Keq= $1x10^{-1}$ at 2000°C

ΔGº at 25c=22.2RT and at 2000C=RT

When you calculate the delta G it comes the positive. So we need the energy to carry out this reaction. So the reaction is also endothermic