Pressure of 10 moles of an ideal gas is changed from \( 2 \mathrm{~atm} \) to \( 1 \mathrm{~atm}...

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Pressure of 10 moles of an ideal gas is changed from \( 2 \mathrm{~atm} \) to \( 1 \mathrm{~atm} \) against constant external pressure without change in temperature. If surrounding temperature \( (300 \mathrm{~K}) \) and pressure \( (1 \mathrm{~atm}) \) always remains constant, then calculate total entropy change \( \left(\Delta \mathrm{S}_{\text {sygtem }}+\Delta \mathrm{S}_{\text {surrounding }}\right) \) for given process.
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