AP Chemistryeasymcq1 pt
A heating curve shows a plateau at 100 °C for water. What process occurs there?
A.Vaporization
B.Melting
C.Heating liquid water
D.Cooling steam
Explanation
Core Concept
At the boiling point, energy input converts liquid to vapor at constant temperature — the plateau. Its length scales with ΔHᵥap and the amount of water.
Correct Answer
AVaporization
More Unit 6: Thermodynamics practice questions
- mediumA heating curve's plateau lengths differ because
- mediumWhich statement about work in chemistry is correct?
- mediumGiven: 2H₂ + O₂ → 2H₂O, ΔH = −571.6 kJ. What is ΔH per mole of water formed?
- mediumWhich statement about enthalpy of formation reactions is correct?
- mediumThe same amount of heat raises iron's temperature more than water's. Why?
Practice more AP Chemistry questions with full explanations
Practice Unit 6: Thermodynamics Questions →