Lesson 6.3.2.3

6.3.2.3 Changes of state and specific latent heat Quiz: AQA Combined Science, Unit 20

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 6.3.2.3, Changes of state and specific latent heat: 20 multiple choice questions for the AQA GCSE Combined Science (8464), Unit 20: Particle model of matter, written with Revision Ninja.

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The 20 questions

  1. Which equation gives the energy for a change of state?

    • E = m / L
    • E = L / m squared
    • E = m x L
    • E = m + L

  2. What is the unit of specific latent heat?

    • J/kg degrees C
    • J/kg
    • kg/J
    • J/degrees C

  3. Specific latent heat of fusion refers to a change from which state to which state?

    • Solid to gas
    • Liquid to gas
    • Solid to liquid
    • Gas to liquid

  4. Specific latent heat of vaporisation refers to a change from which state to which?

    • Gas to solid
    • Liquid to vapour
    • Solid to liquid
    • Solid to gas

  5. What happens to temperature during a change of state?

    • Decreases slowly
    • Stays constant
    • Increases rapidly
    • Fluctuates

  6. What mass of a substance does specific latent heat refer to?

    • One litre
    • One kilogram
    • Ten kilograms
    • One gram

  7. Which property relates to the energy needed for a change of state rather than a temperature change?

    • Specific heat capacity
    • Thermal conductivity
    • Specific latent heat
    • Density

  8. Which change of state uses the specific latent heat of vaporisation?

    • Liquid to vapour
    • Liquid to solid
    • Vapour to liquid
    • Solid to liquid

  9. How much energy is needed to melt 0.5 kg of ice with a specific latent heat of 200 000 J/kg?

    • 20 000 J
    • 400 000 J
    • 100 000 J
    • 50 000 J

  10. What energy is needed to turn 3 kg of liquid into vapour, with a specific latent heat of 2 260 000 J/kg?

    • 753 333 J
    • 67 800 000 J
    • 6 780 000 J
    • 2 260 000 J

  11. How much energy melts 2 kg of solid with specific latent heat 330 000 J/kg?

    • 165 000 J
    • 660 000 J
    • 330 000 J
    • 6 600 000 J

  12. A supply of 150 000 J melts a solid with specific latent heat 300 000 J/kg. What mass melts?

    • 0.5 kg
    • 45 kg
    • 0.05 kg
    • 2 kg

  13. During a change of state, supplied energy alters which quantity?

    • Internal energy
    • Gravitational potential
    • Chemical potential
    • Kinetic energy

  14. A 1.2 kg sample of a liquid needs 2.7 MJ to evaporate completely at its boiling point. What is its specific latent heat of vaporisation?

    • 3 240 000 J/kg
    • 2 700 000 J/kg
    • 2 250 000 J/kg
    • 225 000 J/kg

  15. How much energy is needed to melt 0.8 kg of solid with specific latent heat 250 000 J/kg?

    • 2 000 000 J
    • 20 000 J
    • 312 500 J
    • 200 000 J

  16. For 1 kg of water, which process requires more energy?

    • Freezing
    • Boiling
    • Condensing
    • Melting

  17. In the latent heat equation E = mL, what unit is used for mass?

    • Joules
    • Grams
    • Kilograms
    • Newtons

  18. Energy of 170 000 J melts 0.5 kg of a solid. What is its specific latent heat of fusion?

    • 340 000 J/kg
    • 85 000 J/kg
    • 3 400 000 J/kg
    • 170 000 J/kg

  19. How much energy is needed to melt 0.4 kg of a solid (L = 250 000 J/kg) and then raise the liquid by 10 degrees C (c = 2000 J/kg degrees C)?

    • 100 000 J
    • 8 000 J
    • 200 000 J
    • 108 000 J

  20. A sample of 0.3 kg absorbs 90 000 J at its melting point and changes fully to liquid. What is its specific latent heat?

    • 27 000 J/kg
    • 30 000 J/kg
    • 300 000 J/kg
    • 3 000 000 J/kg

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