Chapter 7: Heat and Temperature Flashcards
Define Heat
Energy in transit from a warm body or region to a cooler one by means of infrared radiation, thermal conduction, or convection.
Define internal energy.
The sum of all the kinetic energies posssessd by all the particles of a substance.
Define thermal energy.
Energy an object possess due to being heated.
Define thermal equillibrium.
The state that exists when two objects (or an object and its environment) are at the same temperature and there is no heat flow between them.
Define specific heat capacity.
The amount of heat that must be added to (or removed from) one gram of a substance to change its temperature 1 C ( 1K).
Define thermal conductivity.
A physical property that indicates the ability of a substance to conduct heat.
State the freezing/melting point for water in C, K, and F.
0 C
32 F
273.2 K
State the boiling/condensing point for water in C, K, and F.
100 C
212 F
373.2 K
Name the three processes of heat transfer.
Conduction
Convection
Radiation
Describe conduction.
The process of heat transfer by the proagation of vibrations of atoms in a solid and, in metals, movement of conduction electrons.
Describe Convection
The process of heat transfer by molecular motion in fluids. Faster molecule mingle and collide with slower moving molecules, transfering their kinetic energy.
Describe radiation.
Heat transfer by electromagnetic waves.
Describe the kinetic theory of gasses.
The theory that the kinetic energy of the gas particles is a function of the internal energy of the gas, and thus gas temerature. It also explains gas pressure is due to the collions of gas particles with the walls of the container.
Use the kinetic theory of gasses to
The kinetic theory says that at higher temperatures, gas particles have higher internal energy. This in turn means they have higher velocity. Higher velocity particles strike the walls of the container producing higher forces from the impact.
