Definitions [3]
Define absolute zero.
The temperature at which the pressure and volume of a gas theoretically reach zero is called absolute zero.
Define coefficient of linear expansion.
Coefficient of Linear expansion is equal to the change in length of a rod of length 1m when its temperature rises by 1°C.
Definition: Temperature
Temperature is a parameter which tells the thermal state of a body (i.e., the degree of hotness or coldness of the body). It determines the direction of flow of heat when two bodies at different temperatures are placed in contact.
Key Points
Key Points: Temperature
- If no heat flows between two bodies in contact, they are said to be at the same temperature, even though their thermal energies may be different.
- The S.I. unit of temperature is kelvin (K), and absolute zero (0 K) is the temperature at which molecular motion ceases.
