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  • An ideal gas undergoes isothermal expansion at constant pressure.  During the process :Option: 1  enthalpy increases but entropy decreases.Option: 2  enthalpy remains constant but entropy increases.Option: 3<

An ideal gas undergoes isothermal expansion at constant pressure.  During the process :
Option: 1  enthalpy increases but entropy decreases.
Option: 2  enthalpy remains constant but entropy increases.
Option: 3  enthalpy decreases but entropy increases.
Option: 4  Both enthalpy and entropy remain constant.  

Answers (1)

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\Delta H = nC_{p}\Delta T \\ \Delta S = nR ln (V_{f}/V_{i})\geqslant 0

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