Apentix/AP Chemistry/Unit 6: Thermodynamics/Question

AP Chemistryeasymcq1 pt

During a phase change, the temperature stays constant. Why?

A.Added heat breaks intermolecular forces instead of raising kinetic energy

B.Heat is destroyed at the transition

C.The substance stops absorbing heat

D.The specific heat becomes infinite

Explanation

Core Concept

At the transition temperature, incoming energy works against the attractions holding the phase together. Temperature — a measure of average kinetic energy — stays flat until the phase change completes.

Correct Answer

AAdded heat breaks intermolecular forces instead of raising kinetic energy

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