Energy of Phase Changes

AP Chemistry· difficulty 3/5

melting boiling heat added → T

The flat plateaus on a heating curve correspond to

  • A

    Phase transitions, where heat goes into changing phase rather than raising temperature

    check_circle
  • B

    Pressure changes

  • C

    Continuous temperature rise

  • D

    Cooling

Explanation

During phase changes, energy added breaks intermolecular forces instead of increasing kinetic energy → T stays constant.

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