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cse • paper_1 • thermal_physicscse-2010-subject-04-001

Ideal gas — UPSC CSE 2010 Physics PYQ

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1 kmol of an ideal gas is compressed isothermally at 400 K from 100 kPa to 1000 kPa in a piston and cylinder arrangement. Calculate the entropy change of the gas, the entropy change of the surroundings and the total entropy change resulting from the process if the process is mechanically reversible and the surroundings consist of a heat reservoir at 400 K.

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