Chemistry

Chemistry

Problem

Which of the following phase changes is endothermic under standard conditions? a) gas→solid  (deposition) \text{gas} \rightarrow \text{solid} \; (\text{deposition}) b) gas→liquid  (condensation) \text{gas} \rightarrow \text{liquid} \; (\text{condensation}) c) solid→liquid  (fusion) \text{solid} \rightarrow \text{liquid} \; (\text{fusion}) d) liquid→solid  (freezing) \text{liquid} \rightarrow \text{solid} \; (\text{freezing})

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