A twenty pound-mass of water in a piston/cylinder with constant pressure is at 1100 F and a volume of 22.6 ft3. It is now cooled to 100 F. Show the P–v diagram and find the work and heat transfer for the process.
Energy Eq.: 1Q2 = m(u2 – u1) + 1W2 = m(h2 - h1)
Process Eq.: Constant pressure ⇒ 1W2 = mP(v2 - v1)
Properties
