11 thermal properties of matter Flashcards
Definition
Heat Capacity
The amount of thermal energy required to raise the temperature of the body by 1K or 1°C.
Formula
Heat Capacity
Q = C∆θ
Q = thermal energy
C = heat capacity
∆θ = change in temperature
Definition
Specific Heat Capacity
The amount of thermal energy required to raise the temperature of a unit mass of the substance by 1K or 1°C.
Formula
Specific Heat Capacity
Q = mc∆θ
m = mass in kg
c = specific heat capacity
∆θ = change in temperature
Definition
Melting
A process where energy is supplied to change the state of a substance from solid to liquid without a change in temperature.
Definition
Freezing
A process where the state of a substance is changed from liquid to solid without a change in temperature.
Definition
Boiling
A process where energy is supplied to change the state of a substance from liquid to gas without a change in temperature.
Definition
Condensation
A process where the state of a substance is changed from gas to liquid without a change in temperature.
Factors
Evaporation
- Temperature
- Exposed surface area
- Relative humidity
- Wind
- Pressure
- Boiling Point of liquid
Definition
Latent Heat
The energy needed to change the state of a substance from solid to liquid or from liquid to gas.
Definition
Latent Heat of Fusion
The energy needed to change the state of a substance from solid to liquid without a change in temperature.
Definition
Latent Heat of Vaporisation
The energy needed to change the state of a substance from liquid to gas without a change in temperature.
Definition
Specific Latent Heat of Fusion
The amount of thermal energy needed to change a unit mass of the substance from solid to liquid without a change in temperature.
Definition
Specific Latent Heat of Vaporisation
The amount of thermal energy needed to change a unit mass of the substance from liquid to gas without a change in temperature.
Unit: Joule per kilogram, J/kg
Formula
Specific Latent Heat of Fusion/ Vaporisation
lf/v = Q/ m
m = mass
Q = thermal energy transferred