Changes

Alternatively, a reversible process is one that can be reversed without changing the system or its surroundings.

Alternatively, a reversible process is one that can be reversed without changing the system or its surroundings.

In contrast, an example of an [[irreversible process]] is the puncturing of a car tire.  It is impossible to put the air back in the tire and patch it up without dissipating energy or changing the tire and the surroundings.  Another example of an [[irreversible process]] is the melting of ice.  The water can be refrozen but not in the same form as the original ice.

In contrast, an example of an [[irreversible process]] is the puncturing of a car tire.  It is impossible to put the air back in the tire and patch it up without dissipating energy or changing the tire and the surroundings.  Another example of an [[irreversible process]] is the melting of ice.  The water can be refrozen but not in the same form as the original ice.  Since something that is clearly a reversible process, like the conversion of a compound from a solid to a liquid, is being called an irreversible process, then everything is an irreversible process.