Consider the following two well-mixed, isothermal gas-phase batch reactors for the elementary and irreversible decomposition of a to b given by the following chemical equation: a k −−→ 2 b (1) in reactor 1, the reactor volume is held constant (reactor pressure therefore changes). in reactor 2, the reactor pressure is held constant (reactor volume therefore changes). both reactors are charged with pure a at 2.0 atm, a and b are considered ideal gases, and k = 0.35 min−1 .

(a) what is the fractional decrease in the concentration of a in reactors 1 and 2 after five minutes?
(b) what is the total molar conversion of a in reactors 1 and 2 after five minutes?