## 5I.35 7th edition

Katie Frei 1L
Posts: 64
Joined: Fri Sep 28, 2018 12:27 am

### 5I.35 7th edition

Does anyone know why for problem 5I.35 in the 7th edition of the textbook the p in the numerator of the correct equilibrium relation is squared? Does it have to do with setting up the ICE box?

Olivia L 4E
Posts: 59
Joined: Fri Sep 28, 2018 12:23 am
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### Re: 5I.35 7th edition

It is squared because the equilibrium equation is [N2][O2]/[NO2]^2. The change in concentration is denoted as p. Because N2 and O2 began with zero initial concentration, you simply use 0+p to get p as the equilibrium concentrations for both. The problem simplified it further by substituting the p in as the concentrations for N2 and O2 which is p x p, thus p^2.