Which of the following statements are correct? Choose ONE or MORE answer(s). i.F

Question

Which of the following statements are correct? Choose ONE or MORE answer(s).

i.For an irreversible piston-cylinder expansion, the work done BY the gas is more than for the reversible process that achieves the same change of state.

ii.For an ideal gas process from state 1 to state 2, the change in enthalpy (H2-H1) will be the same as that for a reversible process compared to the irreversible process for the same change of state.

iii.When a change of state associated with a process is accomplished irreversibly, the change in entropy is negative.

i.For an irreversible piston-cylinder expansion, the work done BY the gas is more than for the reversible process that achieves the same change of state.

Explanation / Answer

i. True , area under P-V curve is higher in irreversible than reversible

ii.True, enthalpy is independent of path

iii.False,irreversibility causes increase in entropy

thus i and ii are correct

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