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2.3 Transfer of thermal energy

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Question 59

Two identical metal cans, X and Y, are filled with equal volumes of hot water at the same initial temperature of 80 ∘C80\ ^\circ\text{C}80 ∘C.

Can X has a dull black outer surface, and can Y has a shiny silver outer surface. Both cans are left to cool in a room at room temperature.

How and why would the temperatures of the water in the two cans differ after a few minutes?

A

Can X would have a lower temperature than Can Y because dull black is a good emitter of radiation.

B

Can X would have a lower temperature than Can Y because dull black is a poor emitter of radiation.

C

Can X would have a higher temperature than Can Y because dull black is a good emitter of radiation.

D

Can X would have a higher temperature than Can Y because dull black is a poor emitter of radiation.

Markscheme

2.3 Transfer of thermal energy Questions

  1. IGCSE
  2. /Physics
  3. /2.3 Transfer of thermal energy

301 exam-style questions on CIE IGCSE Physics 2.3 Transfer of thermal energy, covering 2.3.1a Thermal conductors and thermal insulators, 2.3.1b Explaining thermal conduction, 2.3.2 Convection, 2.3.3a Thermal radiation, 2.3.3b Surface colour and texture, 2.3.3c Rate of emission and absorption of radiation, and 2.3.4 Consequences of thermal energy transfer. Each one has a worked solution and a mark scheme showing where the marks go.

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