A 10m height cylinder with cross sectional area of 0.1 m2 has a massless piston at the bottom as shown in Figure Q2. Water is at the top of the piston with air at 20oC over it. Under the piston there is air at 300K. The volume of the air is 0.3m3. Heat is now transferred to the air so that the piston moves up, spilling the water out over the sides of the cylinder. The specific volume of water is 0.001002m3/kg. Assume that the specific heat of air is constant and equal to 0.7 kJ/kg.K.
(Q) Find the pressure Po of the air over the water, the mass of water at the start of the process.

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