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A gas is contained within a cylinder-piston combination. In the following five sets conditions, t...

A gas is contained within a cylinder-piston combination. In the following five sets conditions, tell (1) whether dW= P dV or not and (2) whether the process is reversible, quasi-static or irreversible.

a) There Is no external pressure on the piston and no friction between the piston and the cylinder wall.
b) There is no external pressure, and friction is small.
c) The piston is jerked out faster than the average molecular speed.
d)The friction is adjusted to allow the gas to expand slowly.
e)There is no friction, but the outside pressure is adjusted so that the gas expands slowly.

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