310105g Heat and Temperature 2025 (TF)

Temperature

The measure of the movement (average kinetic energy) of molecules.

Heat

The transfer of energy from one object to another due to the difference in temperature.

Sensible Heat

The amount of energy needed to raise the temperature of a substance without changing its state.

Specific Heat

The amount of energy needed to raise the temperature of a unit of mass by one degree.

Thermodynamics

The study of possible transformations between mechanical energy and heat energy.

Latent Heat of Fusion

The amount of heat energy needed to change the state of a solid to a liquid and vice versa.

Latent Heat of Vaporization

The amount of heat energy needed to change the state of a liquid to a vapor and vice versa.

Coefficient of Linear Expansion

The fractional amount of expansion per degree change in temperature.

Conduction

The transfer of heat through a solid.

Convection

The transfer of heat through movement of gas or liquid.

Radiation

The transfer of energy by means of photons in electromagnetic waves.

Kelvin Scale

A temperature scale where 0K is absolute zero, the point at which all molecular motion ceases.

Celsius Scale

A temperature scale where 0°C is the freezing point of water and 100°C is the boiling point.

Fahrenheit Scale

A temperature scale where 32°F is the freezing point of water and 212°F is the boiling point.

Thermal Expansion

The expansion of matter due to an increase in temperature.

Expansion of Water

Water expands upon heating and has its greatest density at 3.98 °C.

Coefficient of Area Expansion

Twice the linear expansion value for a substance.

Coefficient of Volume Expansion

Three times the linear expansion value for a substance.