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In thermodynamics, by the common chemistry convention, work done on the system is taken as positive, while work done by the system is negative.

For a cyclic process:

In a mixture of gases, each gas exerts the same pressure regardless of its individual amount

The average kinetic energy of gas molecules is directly proportional to the temperature of the gas in Kelvin.

For ideal and non-ideal gases, which one of the following is correct? 

The internal energy change of an ideal gas depends not only on its temperature, but also its volume or pressure.

In a reversible adiabatic compression of an ideal gas, which of the following statements are correct? i) The gas temperature increasesii) The gas temperature decreasesiii) The internal energy increasesiv) The internal energy decreases

The differential work expression, dw = –Pext dV, applies to compression processes because Vfinal < Vinitial. For expansion processes, however, it is written as dw = Pext dV.

Which reaction has ΔrH°m equal to ΔfH°m (H2O, l, 298.15 K)?

Based on the first law of thermodynamics, which of the following statement is correct?