Which of the following phase changes is endothermic under standard conditions?

CHEMISTRY · Single correct · AP · Chemistry · Thermochemistry · Thermochemistry

Problem

Which of the following phase changes is endothermic under standard conditions? (a)

\text{gas} \rightarrow \text{solid} \; (\text{deposition})

(b)

\text{gas} \rightarrow \text{liquid} \; (\text{condensation})

(c)

\text{solid} \rightarrow \text{liquid} \; (\text{fusion})

(d)

\text{liquid} \rightarrow \text{solid} \; (\text{freezing})