Answer to Question #315708 in General Chemistry for Gaile

Question

The oxidation of ammonia into nitric acid is an exothermic process.

4NH3+5O2=4NO+6H2O Hrxn=-904.4 kj

How will the following conditions affect after the equilibrium of the system?

a. Adding more O2

b. Adding H2O

c. Removing NH3

d. Increasing the temperature of the system

e. Decreasing the pressure in the vessel

(pls answer by alphabet)

Answer 1

In an exothermic reaction, increasing the temp. will lead the reaction in a backward direction, so on increasing the temperature, equilibrium will have less NO.