4. A gas initially at 14 bar and 60C expands to a final pressure of 2.8...

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4. A gas initially at 14 bar and 60C expands to a final pressure of 2.8 bar in an isothermal, internally reversible process. Determine the heat transfer and the work, each in kJ per kg of gas, if the gas is (a) Refrigerant 134a, (b) air as an ideal gas. (c) Sketch the processes on p-v and T-s coordinates. Ans: q = 58.3 kJ/kg, w = 44.3 kJ/kg, q = 153.8 kJ/kg, w = 153.8 kJ/kg 4. A gas initially at 14 bar and 60C expands to a final pressure of 2.8 bar in an isothermal, internally reversible process. Determine the heat transfer and the work, each in kJ per kg of gas, if the gas is (a) Refrigerant 134a, (b) air as an ideal gas. (c) Sketch the processes on p-v and T-s coordinates. Ans: q = 58.3 kJ/kg, w = 44.3 kJ/kg, q = 153.8 kJ/kg, w = 153.8 kJ/kg

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The text in the image describes a thermodynamics problem where a gas expands isothermally ie at a constant temperature from an initial state at 14 bar ... View the full answer