Consider two cylinders of gas identical in all respects except that one contains O2 and the other He. Both hold the same volume of gas at STP and are closed by a movable piston at one end. Both gases are now compressed adiabatically to one-third their original volume. Which gas will show the greater temperature increase?

The first law of thermodynamics: The change in internal energy of a closed system will be equal to the energy added to the system by heating minus the work done by the system on the surroundings. The second law of thermodynamics according to Clausius: Heat can flow spontaneously from a hot object to a cold object; heat will not flow spontaneously from a cold object to a hot object. or No device is possible whose sole effect is to transfer heat from one system at a temperature TL into a second system at a higher temperature TH. The Kelvin-Planck statement of the second law of... Show more

The first law of thermodynamics: The change in internal energy of a closed system will be equal to the energy added to the system by heating minus the work done by the system on the surroundings.

The second law of thermodynamics according to Clausius: Heat can flow spontaneously from a hot object to a cold object; heat will not flow spontaneously from a cold object to a hot object. or No device is possible whose sole effect is to transfer heat from one system at a temperature TL into a second system at a higher temperature TH.

The Kelvin-Planck statement of the second law of thermodynamics: No device is possible whose sole effect is to transform a given amount of heat completely into work.

A general statement of the second law of thermodynamics: The total entropy of any system plus that of its environment increases as a result of any natural process. or
Natural processes tend to move toward a state of greater disorder.

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