Unit 5 - Thermal Physics and Gases Flashcards
Define the internal energy of an object.
The sum of the random distribution of the kinetic and potential energies of its molecules
Define the specific heat capacity
The energy needed to raise the temperature of unit mass of the substance by 1K without change of state.
Define Latent Heat of fusion.
The energy needed to melt a solid at its melting point
Define latent heat of vaporisation.
The energy needed to vaporise a liquid at its boiling point
State Boyle’s Law
Boyle’s Law states that for a fixed mass of gas at constant temperature:
State Charle’s Law.
At constant pressure and mass of gas:
State the pressure law
At constant mass of gas and constant volume:
Explain Boyle’s Law
The pressure of a gas at constant temperature is increased by reducing its volume to increase the rate of impacts.
Explain the pressure law.
The pressure pf a gas at constant volume is increased by raising the temperature. Raising the temperature increases the average speed so increases rate and strength of collisions.
