A-Level CAIE Physics 14 2 Temperature Scales Question Bank

Question 2(a)

2(a)

Some gas, initially at a temperature of \(27.2^{\circ} \mathrm{C}\), is heated so that its temperature rises to \(38.8^{\circ} \mathrm{C}\). Calculate, in kelvin, to an appropriate number of decimal places,

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Question 2(a)

2(a)

2 marks

Question 2(b)

2(b)

Fig. 2.1 shows a simplified diagram of a type of thermometer called a platinum resistance thermometer. The glass tube is immersed in the environment for which the temperature is to be determined. The resistance between the terminals X and Y is measured. Fig. 2.2 shows the variation of the resistivity \(\rho\) of platinum with thermodynamic temperature T.

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Question 2(a)

2(a)

State two other physical properties of materials, apart from the density of a liquid, that can be used for measuring temperature. 1 2

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Question 2(b)

2(b)

The thermometer is initially at \(23.0^{\circ} \mathrm{C}\), as shown in Fig. 2.1. It is used to measure the temperature of an insulated beaker of water that is at \(37.4^{\circ} \mathrm{C}\). The bulb of the thermometer is inserted into the water, and the water is stirred until the reading on the thermometer becomes steady. The mass of water in the beaker is 18.7 g . The mass of mercury in the thermometer is 6.94 g . The specific heat capacity of water is \(4.18 \mathrm{~J} \mathrm{~g}^{-1} \mathrm{~K}^{-1}\). The specific heat capacity of mercury is \(0.140 \mathrm{~J} \mathrm{~g}^{-1} \mathrm{~K}^{-1}\). The glass of the thermometer and the beaker containing the water can be considered to have negligible heat capacity.

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Question 2(c)

2(c)

2 marks

Question 2(a)

2(a)

1 marks

Question 2(a)

2(a)

A resistance thermometer and a thermocouple thermometer are both used at the same time to measure the temperature of a water bath. Explain why, although both thermometers have been calibrated correctly and are at equilibrium, they may record different temperatures.

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Question 2(b)

2(b)

State

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Question 2(c)

2(c)

The temperature of a water bath increases from \(50.00^{\circ} \mathrm{C}\) to \(80.00^{\circ} \mathrm{C}\). Determine, in kelvin and to an appropriate number of significant figures,

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Question 3(a)

3(a)

The resistance of a thermistor at \(0^{\circ} \mathrm{C}\) is \(3840 \Omega\). At \(100^{\circ} \mathrm{C}\) the resistance is \(190 \Omega\). When the thermistor is placed in water at a particular constant temperature, its resistance is \(2300 \Omega\).

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Question 3(b)

3(b)

Fig. 3.1 shows the variations with temperature of the densities of mercury and of water between \(0^{\circ} \mathrm{C}\) and \(100^{\circ} \mathrm{C}\). Temperature may be measured using the variation with temperature of the density of a liquid. Suggest why, for measuring temperature over this temperature range:

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Question 3(c)

3(c)

A beaker contains a liquid of mass 120 g . The liquid is supplied with thermal energy at a rate of 810 W . The beaker has a mass of 42 g and a specific heat capacity of \(0.84 \mathrm{Jg}^{-1} \mathrm{~K}^{-1}\). The beaker and the liquid are in thermal equilibrium with each other at all times and are insulated from the surroundings. Fig. 3.2 shows the variation with time t of the temperature of the liquid.

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Question 3(b)

3(b)

Fig. 3.1 shows the variations with temperature of the densities of mercury and of water between \(0^{\circ} \mathrm{C}\) and \(100^{\circ} \mathrm{C}\). Temperature may be measured using the variation with temperature of the density of a liquid. Suggest why, for measuring temperature over this temperature range:

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Question 3(c)

3(c)

A beaker contains a liquid of mass 120 g . The liquid is supplied with thermal energy at a rate of 810 W . The beaker has a mass of 42 g and a specific heat capacity of \(0.84 \mathrm{Jg}^{-1} \mathrm{~K}^{-1}\). The beaker and the liquid are in thermal equilibrium with each other at all times and are insulated from the surroundings. Fig. 3.2 shows the variation with time t of the temperature of the liquid.

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