Temperature
Key points
- Temperature is proportional to the random kinetic energy of a molecule
- Lowest possible temperature is the absolute zero
Temperature is a measure of ‘hotness’ or ‘coldness’ of a body.
- Proportional to the random kinetic energy of a molecule
- Kelvin Scale – to illustrate the ‘hotness’ or ‘coldness’ of a body
- Since random kinetic energy can be 0, the temperature can be 0 too – absolute zero
- The magnitude of a Kelvin is the same as that of a degree of Celsius
T (in Kelvin, K) = T (in degrees Celsuis, C) + 273
A Thermometer is used to measure temperature.
- Must possess a property that changes in a predictable way with varying temperature
- When the thermometer is in contact with the substance in question, then a thermal interaction occurs until the thermometer and the substance are in a thermal equilibrium
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