Heat Definitions Flashcards
Temperature is:
Temperature is: a measure of the degree of hotness or coldness of a body. [K]
Temperature in degree Celsius =
Temperature in degree Celsius = Temperature in Kelvin – 273.15
A thermometric property is:
A thermometric property is: a physical property that changes measurably with temperature.
Heat is:
Heat is: a form of energy that causes a change in temperature or a change of state of a body. [J]
Heat capacity of a body is:
Heat capacity of a body is: the energy needed to raise the temperature of a body by 1 Kelvin. [J/K]
Specific heat capacity of a substance is:
Specific heat capacity of a substance is: the energy required to raise the temperature of 1kg of a substance by 1 Kelvin. [J Kg-1 K-1]
Latent heat is:
Latent heat is: the energy required to change the state of a body without a change in temperature. [J]
Specific latent heat is:
Specific latent heat is: the energy required to change the state of 1 kilogram of a substance without a change in temperature. [J/kg]
Specific latent heat of fusion of ice is:
Specific latent heat of fusion of ice is: the energy required to change the state of 1 kg of ice from a solid to a liquid without a change in temperature. [J/kg]
Specific latent heat of vaporization of water is:
Specific latent heat of vaporization of water is: the energy required to change the state of 1 kg of water from a liquid to a gas without a change in temperature. [J/kg]
Conduction is:
Conduction is: the transfer of heat energy through a substance from particle to particle without any net movement of the particles. [requires a medium]
Convection is:
Convection is: the transfer of heat energy through a fluid or gas by the circulation of the fluid. [needs a medium]
Radiation is:
Radiation is: the transfer of heat energy by electromagnetic magnetic waves [infrared]. E.g., photos, radiation.
U-value is:
U-value is: the amount of heat energy conducted per second through 1m^2 of a structure when a temperature difference of 1K is maintained between its ends.
[W/m^2 K^1]
Solar constant [solar irradiance] is:
Solar constant [solar irradiance] is: the average energy from the sun falling per second normally on 1m^2 of the Earth’s surface. [W/m^2]
