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Difficulty: EasyTemperature Scales and Thermometric Properties

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

  • Liquid-in-glass thermometerChange in volume of a liquid column
  • Constant-volume gas thermometerChange in gas pressure
  • Platinum resistance thermometerChange in electrical resistance
  • ThermocoupleChange in electromotive force (e.m.f.)

Answer

Liquid-in-glass thermometer matches change in volume of a liquid column; Constant-volume gas thermometer matches change in gas pressure; Platinum resistance thermometer matches change in electrical resistance; Thermocouple matches change in electromotive force (e.m.f.).
Each thermometer relies on a physical property that changes linearly or predictably with temperature: liquid-in-glass uses volume expansion of liquid, constant-volume gas thermometer uses gas pressure variation, platinum resistance thermometer uses electrical resistance change, and thermocouple uses electromotive force generated across thermal junctions.

Step-by-Step Solution

1
Identify the thermometric property for a liquid-in-glass thermometer.
Expansion of liquid volume.
The liquid (mercury or alcohol) expands up a narrow capillary tube as temperature increases.
2
Identify the thermometric property for a constant-volume gas thermometer.
Pressure of a gas.
At constant volume, the pressure of an ideal gas changes linearly with absolute temperature.
3
Identify the thermometric property for a platinum resistance thermometer.
Electrical resistance.
The electrical resistance of metals increases predictably with temperature.
4
Identify the thermometric property for a thermocouple.
Electromotive force (e.m.f.).
A temperature difference between two thermoelectric junctions induces a proportional voltage.

Key Concept

Thermometric properties of common thermometers
Estimated Time:45s
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Topics

Temperature Scales and Thermometric Properties

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