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TSR Wiki > Study Help > Subjects and Revision > Revision Notes > Physics > Thermometers

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Contents 1 Temperature 2 Internal Energy 3 Heat 4 Thermal Dynamic Scale 5 Triple Point of Water 6 Centigrade Scale 7 Fahrenheit Scale 8 Comments

Temperature

• A measure of the hotness of a body. The mean kinetic energy of its particles.

Internal Energy

• The energy contained in a body due to the potential energy and kinetic energy of its particles. It is increased if work is done on it or energy is transferred to the body.

Heat

• Energy transferred due to a difference in temperature.

Thermal Dynamic Scale

• Upper fixed point = triple point of water = 273.16K
• Lower fixed point = absolute zero = 0K
• Measure in Kelvins - symbol K

Triple Point of Water

• The temperature at which water can exist in all three states (solid, liquid and gas) at the same time in equilibrium. (273.16K)

Centigrade Scale

• Upper fixed point = boiling point of water = 100°C
• Lower fixed point = ice point of water = 0°C
• Measured in °C

Fahrenheit Scale

• Upper fixed point =96°F
• Lower fixed point = 32°F
• Measured in °F

• Converting Kelvins into °C: Minus 273. (for the other way round do the opposite i.e. +273). The Celsius scale is derived from the absolute scale and uses the same fixed points.

• A thermometric property is a property of a thermometer that varies continuously with temperature.

Comments