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14.2 Specific heat capacity and latent heat

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Question 8

A technician uses an electric heater rated at 600 W to heat an aluminium block of mass 0.80 kg from 18 ∘C18\ ^{\circ}\text{C}18 ∘C to 68 ∘C68\ ^{\circ}\text{C}68 ∘C. The specific heat capacity of aluminium is 900 J/kg ∘C900\ \text{J/kg}\ ^{\circ}\text{C}900 J/kg ∘C. Assume that 75% of the electrical energy supplied to the heater is transferred to the block.

Calculate the time for which the heater must be switched on.

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14.2 Specific heat capacity and latent heat Questions

  1. GCSE
  2. /Physics
  3. /14.2 Specific heat capacity and latent heat

110 exam-style questions on Edexcel GCSE Physics 14.2 Specific heat capacity and latent heat, covering 14.2.1 Heating, temperature and changes of state, 14.2.2 Specific heat capacity and specific latent heat, 14.2.3 Specific heat capacity calculation, 14.2.4 Specific latent heat calculation, and 14.2.5 Reducing energy transfer through thermal insulation. Each one has a worked solution and a mark scheme showing where the marks go.

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