Question

If the volume and temperature are kept constant, and nothing is added to the reaction mixture, what happens to the total pressure during the course of the reaction?

Answer 1

The ideal gas law is pV=nRT, where p = pressure, V = volumne, n = number of moles, R = gas constant, and T = temperature. If volume, temperature, and number of moles are kept constant, pressure will also be constant during the reaction since the gas constant is also unchanging.