Change of State. The 3 Basic States of Matter. What about Plasma?. Latent Heat & Change of State. Adding or removing heat does not always result in a change of temperature. During a change of state, the heat added is called latent heat because there is no change in temperature.
Q = mDH
Q = the quantity of heat in Joules (J)
m = the mass of the material in g
DH = the latent heat of the substance in J/g