Thermal Physics Flashcards
(7 cards)
1
Q
definition of specific heat capacity
A
quantity of thermal energy required to raise the temperature of a unit mass of a substance by a unit temp rise
2
Q
definition of latent heat
A
amount of energy required to completely change the state of 1kg of a substance without a change in temp
3
Q
combined gas law
A
(p1V1)/T1=(P2V2)/T2
4
Q
what is the area under a pressure-volume graph?
A
work done
5
Q
state four kinetic theory assumptions
A
- all molecules are identical
-gas contains a large number of molecules
-molecules have negligible volume compared to volume of container
-molecules move with continuous random motion
-Kinetic energy is conserved in collisions (collisions are elastic)
-molecules move in straight lines between collisions
-motion of the molecules follow newtons laws
-the time taken for a collision I much less than the time between collisions
6
Q
what is the internal energy of a body
A
sum of the random distributions of kinetic and potential energies of all the molecules in a body
7
Q
what is Brownian motion and how does it support the kinetic theory model?
A
-the type of movement of any particles suspended in a fluid
-supports the model as it shows that particles are moving randomly in a fluid
