d) Internal energy
f) increase in internal energy of a body as its temperature rises
g) changes in the internal energy of a substance during change of phase; constant temperature during change of phase
as temperature of a substance changes
average kinetic energy of particles changes
internal energy changes
as substance changes state
average kinetic energy of particles stays the same
temperature stays the same
potential energy changes
gas
zero potential energy
liquid
small negative potential energy
solid
high negative potential energy