Answer to Question #109059 in General Chemistry for kim

Question

11) Consider the following reaction:
2NO2(g)⇌2NO(g)+O2(g)
The data in the table show the equilibrium constant for this reaction measured at several different temperatures.
Temperature Kp
170 K 3.8×10−3
180 K 0.34
190 K 18.4
200 K 681

part a) Use the data to find ΔH∘rxn for the reaction.
part b) Use the data to find ΔS∘rxn for the reaction.

Answer 1

1. delta H = 114 kJ

2. Delta S Knot = 2(240)-(2(211)+205) = -147J/(mol*K)