Thermodynamics Flashcards
What is internal energy equal to?
Kinetic energy of particles + potential energy between particles
What is temperature directly related too?
The kinetic energy of the atoms
What is specific latent heat?
The energy required to change the state of 1kg of substance with no change in temperature
What happens to the energy when a molecule changes state?
The energy gained is used to break the inter molecular bonds and therefore increasing the potential energy of the substance
What are the four ways in which energy can be transferred?
By radiation
By heating
Mechanically
Electrically (moving electrons)
When considering the internal energy of a gas, what are the 5 assumptions you form?
- All the particles are identical
- The volume of particles is negligible compared to the volume of the gas
- All collisions are elastic
- Collisions are instantaneous
- Intermolecular forces are negligible except during collisions
What is absolute zero?
0K
Where there is no kinetic energy in a substance
What is a black body radiator?
Something that absorbs all incident electromagnetic radiation regardless of frequency or angle of incidence.
What is the radiation emitted from a black body radiator determined by?
It’s temperature
What is the difference between luminosity and luminous intensity?
Luminosity is energy emitted per second
Intensity is energy hits per m^2 per second
