The gas phase reaction AB+C is to be carried out isothermally in a 20 dm3 constant-volume batch reactor. Twenty moles (20 moles) of pure A is initially placed in the reactor. The reactor is well mixed.

Calculate the time necessary to reduce the number of moles of A in the reactor to 0.2 mole.

a) If the reaction is second order : -rA = k CA2 with k= 2 dm3 /mol.min-1.

b) If the temperature is 127oC, what is the initial total pressure? What is the final total pressure assuming the reaction goes to completion?