| Give internal energy, kineteic energy and potential energy as a formula | U = sum of Ep + Sum of Ek
Internal energy = sum of potential energy + sum of the kinetic energy |
| Give heating applied, work done and internal energy as a formula | Change in U = Change in W + Change in Q
Change in internal energy = work done to it + heating applied to it |
| Whats the kinetic energy of the moleules directly proportional to? | Absolute temperature |
| Whats Brownian motion | Reseon as to why there is a constant random movement of particles in a liquid and gas |
| What was Brownian motion evidence of | Evidence of excistence of atoms |
| What equation can the 3 gas laws be condensded to? | (PV)/T = constant
(Pressure x volume) / temperature = constant |
| For this question state what happens and why
If you decrease the volume, and keep the temperature constant, what happens? | Pressure increases
Cause theres less space for the mlecules so they collide with the walls of their container more frequently |
| For this question state what happens and why
If you increase T, but keep V constant | P increases
Because the molecules move faster, so they collide wth eachother more often, and with more energy so the collsions have more force |
| For this question state what happens and why
Increase Temperature, and keep the Pressure constant | V increases
Becasue the molecule move faster and so collide more. They also move faster and have more energy
Since pressures constant the volume needs to increase |
| What is the molecular theory model equation for thermal physics | pV = idgaf
= 1/3 X number of moles X mass X root mean speed squared |
| What assumotions were made about the kinetic theory model? | Randomness
Attraciviness
Volume
Elastic
Duration |
| For the kinetic thory model, explain what is meant by random motion | Molecules have a range of speeds (1)
They have no preferred direction of movement (1) |
| What did Brownian motion find out about particles | That small, fast moving particles move larger partiles |
