AP Chemistrymediummcq1 pt
A heating curve's plateau lengths differ because
A.ΔHᵥap and ΔHfus differ
B.Specific heats change sign
C.The substance stops absorbing energy
D.Plateau length is arbitrary
Explanation
Core Concept
Each plateau consumes n × ΔH_transition of energy. Since vaporization costs far more than fusion, its plateau is far longer for the same sample.
Correct Answer
AΔHᵥap and ΔHfus differ
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