The throttling calorimeter is a device for measuring the state of a liquid-vapor mixture. The procedure is to bleed off a little of the mixture, throttle it through a valve, and make the measurements shown. Explain why P1 and T1 do not fix the state of the "wet" mixture, and how P2 and T2 measurements allow one to determine state 1. How much throttling is necessary for this scheme to work? Compute the quality at state 1 for the measurements below, assuming the fluid is water.