A sample of ideal gas is compressed from initial volume of 2V_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 2V_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 is least for the isothermal path, larger for the reversible adiabatic, and largest for the irreversible adiabatic (constant external pressure equal to the final pressure, which exceeds all pressures along the reversible path). In adiabatic paths Δ U = W, so T 3 > T 2 > T 1 = T 0 . (a) false. (b) false: Δ H = 0 for the isothermal ideal gas, the smallest magnitude. (d) false: with the same final volume, P ∝ T, so the pressure is highest for process 3. Only (c) is true.

Chemistry - Thermodynamics - I Question with Solution | TestHub

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