1.2kJ of work was done on a DIATOMIC ideal gas in a PERFECTLY INSULATED container. A. How much heat energy was transferred? B. What is the change in the internal energy of the system? C. Will the temperature increase or decrease during this process, and how much? D. What is the change in enthalpy?

An insulated vessel with a total volume of 0.50m3 is divided by a rigid, thermally conductive diaphragm into two chambers A and B with equal volume. Chamber A contains air that is initially at 140kPa and 290K. Chamber B contains air that is initially at 4200kPa and 440K. a) What is the final equilibrium temperature of the system? State all assumptions you make. b)What is the final pressure on each side of the diaphragm? c)What is the entropy generated during this process? Use average specific heats for air.

2. A piston-cylinder system has a mass of piston of 900 kg and an area of piston equals to 0.00981 m². At the start of the process, 1.0 kg of water in the system is at its saturated vapour state at 20.0 MPa. The system is allowed to cool, at a constant volume, until its internal and external pressures are the same. At the end of the isobaric process, half of the cylinder is filled with liquid and half with vapour, by volume. Given Atmospheric pressure, Patm = 100 kPa Acceleration due to gravity, g = 9.81 m/s² a) Find the pressure, temperature, volume, and quality of vapour at each of the 3 states. State Pressure, P kPa 1 2 3 Temperature, T Volume, V Quality of Vapour, x °C m³ b) Determine the work done for this process (in kJ). c) Sketch the T (in °C) vs v (in m³/kg) diagram for this process.

T/F: The latent heat of vaporization is the energy required to change the state without changing the temperature.