Gce Model Questions Vol1 2025 Physics Question 9
Practice essay / theory question 9 from the 2025 Gce Model Questions Vol1 Physics examination. This question covers Ideal gases, First law of thermodynamics, Specific heat capacities, Isothermal processes, Thermal efficiency .
A sealed vertical cylinder contains 0.50 mol of an ideal diatomic gas at an initial temperature of 300 K and a pressure of 1.00 atm. The gas is first heated at constant volume until its temperature reaches 450 K. The cylinder then has a frictionless piston attached, and the gas is allowed to expand isothermally at 450 K until the pressure returns to 1.00 atm. (a) Calculate the amount of heat supplied to the gas during the constant‑volume heating. (b) Determine the work done by the gas during the subsequent isothermal expansion. (c) State the net change in internal energy of the gas for the whole two‑stage process. (d) If the heat added in part (a) is regarded as the energy input to a heat‑engine and the work obtained in part (b) is the useful output, evaluate the efficiency of this engine.
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This is Gce Model Questions Vol1 2025 Physics Question 9. It is one of the essay questions from the 2025 Gce Model Questions Vol1 Physics examination.
The question covers Ideal gases, First law of thermodynamics, Specific heat capacities, Isothermal processes, Thermal efficiency .
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