State

1. (a)State
2. (a)(i)what may be deduced from the difference in the temperatures of two objects,[1]
3. (a)(ii)the basic principle by which temperature is measured.[1]
4. (b)By reference to your answer in (a)(ii), explain why two thermometers may not give the same temperature reading for an object.[2]
5. (c)A block of aluminium of mass 670 g is heated at a constant rate of 95W for 6.0 minutes. The specific heat capacity of aluminium is 910Jkg⁻¹K⁻¹. The initial temperature of the block is 24 °C.
6. (c)(i)Assuming that no thermal energy is lost to the surroundings, show that the final temperature of the block is 80°C.[3]
7. (c)(ii)In practice, there are energy losses to the surroundings. The actual variation with time t of the temperature θ of the block is shown in Fig. 1.1. [Figure 1.1]
8. (c)(ii)1Use the information in (i) to draw, on Fig. 1.1, a line to represent the temperature of the block, assuming no energy losses to the surroundings.[1]
9. (c)(ii)2Using Fig. 1.1, calculate the total energy loss to the surroundings during the heating process. energy loss = ..................................................... J[2]

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