Question

At 380 C, the half-life period for the first order decomposition of HO, is 360 min. The energy of activation of the reaction is 200 kJ mor. Calculate the time required c) for 75% decomposition at 450°C. (10 Marks) A mixture of diatomic nitrogen and diatomic hydrogen gas in a 1:3 molar ratio was passed over a catalyst to form ammonia at 450 C. At pressure of 10.13 atm, there was 2.04% by volume of ammonia gas formed. Determine the equilibrium constant for the d) reaction N2 (E)2 (g) NH (8) (Equation 3)

Answer 1

Note that by % V proportional to % P I meant that % of total pressure the partial pressure is dependent on amount (in moles) of the substance and more is % volume for a constituent of mixture more will be the % of total pressure that its partial pressure will constribute. Don't confuse it with P proportional to 1/V we get for ideal gas law. Tha latter is true only for constant amount of substance.

Comment if you have any doubt.