1. The rate of the homogeneous gas-phase reaction: A + 3B 2X + Y has been studied. Some of the data are: Initial total pressure change rate (-dP/dt) / (torr/s) Initial pressure A P/ torr 352 Initial pressure B P/ torr Run 289 247 153 392 3.44 6.55 8.14 3 4 617 (a) What are the orders of the reaction with respect to A and with respect to B? (b) Assume that the gas mixture is ideal and find the relation between the usual rate of reaction, v, and dP/dt, where P is the total pressure. The volume is constant.