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2.2 Thermal properties and temperature

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Question 123

A student is determining the specific latent heat of vaporisation of a liquid.

She puts the liquid in a well-insulated container and heats it with a 150 W heater. The mass of the liquid when it starts to boil is 450 g. She continues to heat the liquid for a further 10 minutes10\text{ minutes}10 minutes, after which the mass of the remaining liquid is 150 g.

What is the specific latent heat of vaporisation of the liquid? (Assume that all the thermal energy from the heater is used to vaporise the liquid.)

A

9000 J/kg9000\text{ J/kg}9000 J/kg

B

200,000 J/kg200,000\text{ J/kg}200,000 J/kg

C

300,000 J/g300,000\text{ J/g}300,000 J/g

D

300,000 J/kg300,000\text{ J/kg}300,000 J/kg

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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