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14.2 Specific heat capacity and latent heat

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Question 10

A laboratory measures the melting of a solid food fat at its melting point. The specific latent heat of fusion of the fat is 2.5 × 105 J/kg. The measurements are shown below.

MeasurementMass
Liquid fat collected during the test0.042 kg
Liquid fat produced in a control test without the heater0.006 kg

Calculate the energy transferred to change the state of the fat melted by the heater. Use Q=mLQ=mLQ=mL.

[1]
A

1.5×103 J1.5\times10^3\ \mathrm{J}1.5×103 J

B

1.2×104 J1.2\times10^4\ \mathrm{J}1.2×104 J

C

1.05×104 J1.05\times10^4\ \mathrm{J}1.05×104 J

D

9.0×103 J9.0\times10^3\ \mathrm{J}9.0×103 J

Markscheme

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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