5.1 thermal physics Flashcards
What is produced when two objects are in contact an one is hotter than another?
net flow
When there is no net transfer of thermal energy both objects are known to be in?
thermal equilibrium
order the states from most KE to least
gas, liquid, solid
When temperature is applied to a solid what happens to the atoms?
vibrate around their fixed positions.
When temperature is applied to a gas what happens to the atoms?
collisions result in the molecules travelling with random speed and direction
What is the name of the principle when gas travel in random direction with random velocity?
Brownian motion
When a substance changes state which energy changes?
potential energy increases
When a substance is heated but remains same state wat energy changes?
Kinetic energy increases
What is absolute zero?
Point where all molecules stop moving completley
What is the units for specific heat capacity?
jKg^-1K^-1
What specific latent heat of fusion?
Solid to liquid change in state
What specific latent heat of vaporization?
Liquid to gas change in state
List the certain assumption to model gas as an ideal gas
The gas contains a large number of atoms which move with random, rapid motion.
* The volume of the gas atoms is negligible when compared to the total volume of the gas.
* All collisions between atoms, with other atoms and with the walls of the container they
are in, are perfectly elastic.
* The time taken for atoms to collide is negligible compared to the time between collisions.
* The electrostatic forces between atoms are negligible, except for when the atoms are
colliding
What term is used to describe the collisions between atoms?
-Perfectly elastic
What does Boyles law state?
For a fixed mass of gas at constant temperature, the pressure is inversely proportional to the volume
