Question

For a single substance at atmospheric pressure, classify the following as describing a spontaneous process, a nonspont...

For a single substance at atmospheric pressure, classify the following as describing a spontaneous process, a nonspontaneous process, or an equilibrium system. 

Drag the appropriate items to their respective bins.  

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Determine whether each of these processes is reversible or irreversible. 

Drag the appropriate items to their respective bins.

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Answer #1

Answer 1.
solid melting below its melting point - non-spontaneous
gas condense below condensation point - spontaneous
liquid vaperize above its boiling point - spontaneous
liquid vaporizing below its boiling point - non-spontaneous
liquid freezing below its freezing point - spontaneous
liquid freezing above its freezing point - non-spontaneous
solid melting above its melting point - spontaneous
liquid and gas together at the boiling point with no net condensation or vaporization - equilibrium
gas condensing above its condensation point - non-spontaneous
solid and liquid together at the melting point with no net freezing or melting - equilibrium

Answer 2.
solid melting infinitesimally slowly at its melting point - reversible
a single swing of a real pendulum - irreversible
gas condensing infinitesimally slowly at its condensation point - reversible
a single swing of a frictionless pendulum - reversible
liquid vaporizing above its boiling point - irreversible
liquid freezing infinitesimally slowly at its freezing point - reversible
solid melting infinitesimally slowly above its melting point - irreversible
liquid vaporizing infinitesimally slowly at its boiling point - reversible
liquid freezing below its freezing point - irreversible
gas condensing below its condensation point - irreversible

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