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AP Chemistry
6.5 Energy of Phase Changes
IntermediateMCQConceptual22.1k
A student conducts an experiment to compare the thermal energy required for phase changes of water, \(\text{H}_2\text{O}\). The student measures the thermal energy required to completely melt a \(18.0 \text{ g}\) sample of ice at \(0^\circ\text{C}\) (\(q_{\text{fus}}\)) and the thermal energy required to completely vaporize a \(18.0 \text{ g}\) sample of liquid water at \(100^\circ\text{C}\) (\(q_{\text{vap}}\)). Which of the following correctly compares \(q_{\text{vap}}\) to \(q_{\text{fus}}\) and provides the correct molecular explanation?

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