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Difficulty: MediumTemperature Scales and Thermometric Properties

Match each thermometer type on the left with its corresponding physical thermometric property on the right.

  • Constant-volume gas thermometerVariation of gas pressure at constant volume with temperature
  • ThermocoupleVariation of electromotive force (e.m.f.) with temperature
  • Platinum resistance thermometerVariation of electrical resistance with temperature
  • Liquid-in-glass thermometerVariation of liquid column length/volume with temperature

Answer

Constant-volume gas thermometer matches variation of gas pressure at constant volume; Thermocouple matches variation of electromotive force (e.m.f.); Platinum resistance thermometer matches variation of electrical resistance; Liquid-in-glass thermometer matches variation of liquid column length/volume.
Each thermometer is paired with its corresponding thermometric property: constant-volume gas thermometer relies on gas pressure variation, thermocouple relies on thermoelectric e.m.f. variation, resistance thermometer relies on electrical resistance variation, and liquid-in-glass thermometer relies on liquid thermal expansion.

Step-by-Step Solution

1
Identify the thermometric property for a constant-volume gas thermometer.
Gas pressure at constant volume.
Pressure varies linearly with temperature for an ideal gas at constant volume.
2
Identify the thermometric property for a thermocouple.
Electromotive force (e.m.f.).
The thermoelectric effect generates an e.m.f. proportional to the temperature difference between two junctions.
3
Identify the thermometric property for a platinum resistance thermometer.
Electrical resistance.
The electrical resistance of platinum increases continuously and predictably with temperature.
4
Identify the thermometric property for a liquid-in-glass thermometer.
Liquid column length/volume.
The liquid expands linearly along the capillary stem as temperature rises.

Key Concept

Thermometric Properties of Thermometers
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Topics

Temperature Scales and Thermometric Properties

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