Thermodynamics Flashcards
Conduction
Process by which heat flows from hot to cold without any net movement of the substance
Thermal conductivity
A measure of the ability of material to conduct heat
Convection
Heat transfer by mass motion of a fluid from one region (more dense) to another (less dense)
Forced Convection
Convection created by external forces (a radiator)
Newton’s Law of Cooling
The rate of change of the temperature of an object is proportional to the difference between its own temperature and the ambient temperature (i.e. the temperature of its surroundings).
Radiation
Heat transfer by EM waves without an intervening medium
Stefan’s Law
The thermal energy radiated by a blackbody radiator per second per unit area is proportional to the fourth power of the absolute temperature and is given by
Q=
C*deltaT
Specific Heat Capacity
The amount of energy supplied through heat to raise the temperature of 1kg of a substance by 1K
Molar Heat Capacity
The amount of energy supplied through heat to raise the temperature of a sunstance by 1K (At a constant pressure/volume)
Latent Heat
The amount of energy absorbed or released when a phase change takes place for the substance
Work done=
Force*change in distance
Pressure*change in volume
Density=
m/v
P=
W/t
Internal Energy=
KE+PE
How do you calculate work done from a heat engine?
W=Q1-Q2
