Consider a mole of steam under very high pressure, so that the van der Waals model is the correct equation of state. The constants for steam are a = 5.5 lite? atm/mole2. b = 0.030 liter mole. Suppose that the steam is initially at a pressure of 100 atm with a volume of 0.3 liter and then is expanded to twice this volume. Find
(a) the initial temperature of the steam,
(b) the final temperature if the expansion is isobaric,
(c) the final pressure if the expansion is isothermal.