Particle Model of Matter Flashcards
1
Q
What type of change are changes of state, and why?
A
Changes of state are physical changes which differ from chemical changes because the material recovers its original properties if the change is reversed.
2
Q
What is the internal energy of a system?
A
Internal energy is the total kinetic energy and potential energy of all the particles that make up a system.
3
Q
What is the specific latent heat?
A
The specific latent heat of a substance is the amount of energy required to change the state of one kilogram of the substance with no change in temperature.
4
Q
Define the two specific latent heat values for a substance.
A
s.l.h. of fusion - between solid and liquid. s.l.h. of vaporisation - between liquid and gas.
5
Q
What is work?
A
Work is the transfer of energy by a force.
