Thermal Physics Flashcards
Energy transfer as a result of difference in temperature
Thermal energy
Sum of total potential energy and random kinetic energy
Internal energy
Determines the direction of heat flow
Temperature
Amount of substance that contains as many atoms as there are in 12g of carbon 12
The mole
Mass of one mole of a substance
Molar mass
Amount of thermal energy required to raise the temperature of 1 kg in a particular material by 1 kelvin
Specific heat capacity , c
Amount of temperature required to raise the temperature of a body by 1 kelvin
Thermal capacity
Amount of energy required to change state of 1 kg a particular change of temperature
Specific latent heat
Gradual change in state below boiling point. Occurs at the surface
Evaporation
Change in state throughout the liquid at the same temperature
Boiling
Value of zero assigned to water freezing point, value of 100 assigned to water boiling point
Celsius temperature scale
Defined as T in kelvin = T in Celsius + 273
Absolute temperature
When state of matter is changing, … Does not change
Temperature
Molecules move with a range of speeds,
Volume of molecules is negligible compared with volume of the gas itself
Collisions of molecules with each other and the container walls are elastic
Molecules exert no forces on each other or the container except when in contact
Molecules obey Newtons law of mechanics
Kinetic theory of gases
Measure of the average kinetic energy of the molecules of a substance
Absolute temperature
