Thermal Physics Flashcards
Define Heat
The energy transferred between two objects because of the temperature difference between them.
Two objects are in thermal equilibrium if
No net flow of heat in thermal contact
At the same temp
Define absolute zero
Zero point on thermodynamic temperature scale in kelvin
Thermometric properties are
The properties of a thermometer that allows it to measure temperature
Triple point of water
273.16K/0.01C
Define ideal gas
An ideal gas is a gas which obeys the equation pV = nRT, where
p is the pressure of the gas,
V is the volume of the gas,
T is the thermodynamic temperature of the gas,
and N is the amount of gas in moles.
Pressure law
Pressure is proportionate to volume
Charles law
Volume is proportionate to temperature
Boyle’s law
Pressure is inversely proportional to temperature
6 assumptions of the kinetic theory of gases
- Any gas is made up of a large no. of particles
- Constant and random motion
- Perfectly elastic collisions between particles and wall
- Vol is negligible, any 2 particles are far apart, low chance of collision
- Force between particles is negligible except during time of collision
- Duration of collision is negligible
Define Heat capacity
Quantity of heat required to raise the body temp by 1 degree
Define specific heat capacity
Quantity of heat required to raise the temp of a unit mass of the substance by 1 kelvin
Formula for specific heat capacity
Q = mc(change in temp)
Specific latent heat of fusion
Quantity of heat required to convert a unit mass of solid to liquid without any change in temperature
Specific latent heat of vaporization
Quantity of heat required to convert a unit mass of liquid to gas without any change in temperature