Applied Heat Thermodynamics

1. Methane has the chemical formula CH4. If the value of the Universal Gas Constant is 8.314 kJ kg-1 K-1, calculate the value of the gas constant for methane. 2. A piston/cylinder system has an initial volume of 0.1 cubic metre and contains air at a pressure of 1 bar. The piston compresses the air to a volume of 0.05 cubic metre. Calculate the final pressure: (a) for adiabatic compression (b) for isothermal compression ASSUME Y = 1.4 See attached file for full problem description.

Applied Heat Thermodynamics

Applied Heat Thermodynamics. 3. Calculate the change in enthalpy during a compression process in which the work done on the working medium is 24 kJ, and the change in internal energy is 36 kJ. Heat added or rejected 4. Derive the numerical ratio ---------------------------- for Work done (a) an adiabatic process (b) an isothermal process. See attached file for full problem description.

Introductory Thermodynamics

The answer to this question is given as 140.7 deg C, but I have no idea how to get there A rigid tank with a volum of 2.5m^3 contains 5kg of saturated liquid-vapor mixture of water at 75deg C. Now the water is slowly heated. Determine the temperature at which the liquid in the tank is completely vaporized. Also show the process on a T-v diagram with respect to saturation lines.

Closed system energy analysis

A rigid tank contains 5 lbm of water at 60 Psia, 320 F. The temperature of the water drops to 260 F as a result of heat transfer to the surroundings. Determine the final pressure in the tank?

Heat transfer and work Problem

A cylinder is fitted with a frictionless piston contains 10 lbm of R-134a at 100 Psia, 300 F. The system is cooled at constant pressure until it reaches a quality of 25%. Determine the work in BTU for this process?