A sample of ideal gas is compressed from initial volume of 3V_o to V_o using three different processes
(1) reversible isothermal
(2) reversible adiabatic
(3) irreversible adiabatic under a constant external pressure
Then

Question

A sample of ideal gas is compressed from initial volume of 3V_o to V_o using three different processes

(1) reversible isothermal

(2) reversible adiabatic

(3) irreversible adiabatic under a constant external pressure

Then

TestHub · Accepted Answer

Work done on the gas equals the area under the P-V path (or, for process 3, P ext Δ V with P ext equal to the highest pressure). The isothermal curve lies lowest, so W 1 < W 2 < W 3 . (a) false: T 3 > T 2 > T 1 , lowest is process 1. (b) false: same final volume, P ∝ T, so process 3 has the highest pressure. (d) false: Δ U = 0 in isothermal, and positive in the adiabatic processes. Only (c) is true.

Chemistry - Thermodynamics - I Question with Solution | TestHub

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