TEST
WHAT IS HEAT
THE TRANSFER OF THERMAL ENERGY
Heat of Vaporazation
The thernal energy neede to vaporize a substance
1st law of thermodynamics
States that the change in thermal energy of an object is equal to the heat added to an object minus the work of an object
Thermal Conduction
The transfer of thermal energy that occurs when particles collide
Amorphous Solid
A substance that has no regular crystal structure but does have a define shape and volume
Pascal's Principle
States that any change in pressure applied to any poin on a confined fluid is transferred undimished throughout the fluid
Heat engine
A device that is able to continuously convert thermal energy to mechanical energy
Pascal
The SI unit for pressure
Plasma
The gas like states of negatively charged electrons and positively charged ions
Fluids
Materials that can flow and have no define shape of their own
Temperature
A measure of the average kinetic energy of the particles in the oobject
Heat of fusion
The amount of thermal energy needed to melt a substance
Thermal Equilibrium
The state in which the rates of thermal energy transfer between 2 objects are equal and the objects are at the same temperature
Conduction
Heat caused between 2 objects in contact
Bouyant Force
The increase in pressure with increasing depth creates an upward forcce
Entropy
The measure of disperal of energy
Adhersive Force
Attractive fiorces that act between particles of defferent substance
2nd law of thermodynamics
States that whenever there is an opportunity for energy dispersal, the enrgy always spreads out
Archimedes principle
States that an object immersed in a fluid has an upward force on it that is equal to the weight of the fluid display by the object
crystal lattice
when the temperature of a liquid is lowered the cohesive forces have more effect and for many solids the paricles become frozen into fixed patterns
Specific Heat
The amount of energy that must be added to the material to raise the temperature of a unit mass by one temperature unit
Convection
Heat caused by the motion of fluid in a liquid or gas due to temperature differences
Radiation
The transfer of electromagentic waves
Pressure
The perpendicular component of a force on a surface divided by the area of the surface
Cohesive Forces
The force of attraction that like particles exert on one another
Thermal Expansion
A property of all forms of matter that causes the matter to expand becoming less dense when heated
Combined gas law
Expressed the relationship between the pressure volume and absolute temperature of a fixed amount of gas
Ideal Gas Law
States the pressure times the volume equal to the matter of moles mulriplied by the constant and the temperature