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2.2 Thermal properties and temperature

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Question 200

When a solid melts at its melting point to become a liquid at the same temperature, its internal energy increases. What is the primary cause of this increase?

A

an increase in the average kinetic energy of the particles

B

an increase in the potential energy of the particles as they break free from their fixed positions

C

a decrease in the average speed of the particles

D

a decrease in the average separation of the particles

Markscheme

2.2 Thermal properties and temperature Questions

  1. IGCSE
  2. /Physics
  3. /2.2 Thermal properties and temperature

528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.

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