heat and internal energy Flashcards
1
Q
what is internal energy
A
internal energy is the sum of kinetic energy and potential energy stored inside a body. the kinetic energy increases when the temperature of the body increases. the potential energy increases when particles inside the body increase in separation during a change of state
2
Q
what is potential energy due to
A
it is due to the forces between the particles
3
Q
what is heat
A
heat is the energy transferred from one body to another as a result of temperature difference between the bodies
4
Q
doing work and heating
A
doing work and heating are two different ways of transferring energy from one body to another
5
Q
what is energy expressed in for practical use
A
kilowatt-hour (kWh)
