A reversible process is one that whose direction can be reversed by inducing minute changes to the property of the system. The system is in thermodynamic equilibrium throughout.
An irreversible process is one that when it cannot return to the initial system and surroundings. It is not in equilibrium throughout the process.
Determine whether each of these processes is reversible or irreversible.
1) solid melting infinitesimally slowly at its melting point
2) a single swing of a real pendulum
3) gas condensing infinitesimally slowly at its condensation point
4) solid melting infinitesimally slowly above its melting point
5) liquid freezing below its freezing point
6) liquid freezing infinitesimally slowly at its freezing point
7) a single swing of a frictionless pendulum
8) liquid vaporizing infinitesimally slowly at its boiling point
9) gas condensing below its condensation point
10) liquid vaporizing above its boiling point
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