Answer:
Reversible Processes:
- solid melting infinitesimally slowly at its melting point
- gas condensing infinitesimally slowly at its condensation point
- a single swing of frictionless pendulum
- liquid vaporizing infinitesimally slowly at its boling point
- liquid freezing infinitesimally slowly at its freezing point
Irreversible Processes:
- a single swing of a real pendulum
- solid melting infinitesimally slowly above its melting point
- liquid freezing below its freezing point
- gas condensing below its condenation point
- liquid vaporizing above its boiling point
Step-by-step explanation:
Hint to help solve: "spontaneous processes, such as a solid melting above its melting point, are not reversible according to the scientific definition. Certainly one could place the melted substance in a cold environment and it would freeze again, but the surroundings would not be restored to their original state before melting and, in fact, would be further altered in the cooling process" - Mastering Chem.