Heat Energy - 'Latent Heat' (i.e. energy required to change state)

This lecture video caculates heat energy required in chaning the state of a substance, form solid to liquid and from liquid to gaseous, using teh formula Q = m h. The lecture also uses formulae from the previous 'heat energy' lecture, i.e. to calculate the heat energy required when changing the temperature of a substance. Examples, and exercises (with full wokrked solutions) are included and an array of questions are listed at the end of the lecture video, for students to undertake at their own pace.