An ideal gas of mass m and temperature T1 undergoes a reversible isothermal process from an initial pressure P1 to a final pressure P2. The heat loss during the process is Q. The entropy change ΔS of the gas is

\(mR\ln \left( {\frac{{{P_2}}}{{{P_1}}}} \right) - \frac{Q}{{{T_1}}}\)

\(mR\ln \left( {\frac{{{P_2}}}{{{P_1}}}} \right)\)

\(mR\ln \left( {\frac{{{P_1}}}{{{P_2}}}} \right)\)

An ideal gas of mass m and temperature T1 undergoes a reversible isoth

1.	An ideal gas of mass m and temperature T1 undergoes a reversible isothermal process from an initial pressure P1 to a final pressure P2. The heat loss during the process is Q. The entropy change ΔS of the gas is
A.	\(mR\ln \left( {\frac{{{P_2}}}{{{P_1}}}} \right)\)
B.	\(mR\ln \left( {\frac{{{P_1}}}{{{P_2}}}} \right)\)
C.	\(mR\ln \left( {\frac{{{P_2}}}{{{P_1}}}} \right) - \frac{Q}{{{T_1}}}\)
D.	Zero
Answer» C. \(mR\ln \left( {\frac{{{P_2}}}{{{P_1}}}} \right) - \frac{Q}{{{T_1}}}\)

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An ideal gas of mass m and temperature T1 undergoes a reversible isothermal process from an initial pressure P1 to a final pressure P2. The heat loss during the process is Q. The entropy change ΔS of the gas is

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