Thermodynamics
Temperature and temperature scales, the Cat A thermodynamics scope.
Thermodynamics (Cat A), summary notes
- Temperature is a measure of how hot or cold something is, the average kinetic energy of its particles. Heat is energy that flows from a hotter body to a colder one.
- Three scales are used: Celsius (°C), Fahrenheit (°F) and Kelvin (K). Kelvin is the absolute scale, starting at absolute zero (−273°C), where particle motion stops.
- Heat always flows from hot to cold, never the other way on its own.
- Celsius to Kelvin
- K = °C + 273
- Celsius to Fahrenheit
- °F = (°C × 9/5) + 32
Convert 27°C to kelvin.
K = °C + 273 = 27 + 273 = 300 K.
Convert 100°C to Fahrenheit.
°F = (100 × 9/5) + 32 = 180 + 32 = 212°F, the boiling point of water.
Temperature scales & thermal expansion
Heat transfer, conduction, convection & radiation
Thermodynamics concept map
Thermodynamics
Temperature quiz
Temperature (Cat A)
1. Temperature is a measure of:
Hotness or coldnessMassForce2. The SI unit of temperature is the:
KelvinCelsiusFahrenheit3. At sea level, water freezes at:
0 °C100 °C32 °C4. At sea level, water boils at:
100 °C0 °C212 K5. On the Fahrenheit scale, water freezes at:
32 °F0 °F100 °F6. On the Fahrenheit scale, water boils at:
212 °F100 °F32 °F7. Absolute zero is approximately:
−273 °C0 °C273 °C8. 0 °C expressed in kelvin is:
273 K0 K373 K9. 100 °C expressed in kelvin is:
373 K273 K100 K10. To convert °C to K you:
Add 273Subtract 273Multiply by 27311. To convert K to °C you:
Subtract 273Add 273Multiply by 9/512. 25 °C expressed in kelvin is:
298 K248 K25 K13. The Kelvin scale starts at:
Absolute zeroWater's freezing pointRoom temperature14. A device used to measure temperature is a:
ThermometerBarometerHydrometer15. Between the freezing and boiling of water, the Celsius scale has:
100 divisions180 divisions273 divisions
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