Heat changes state of matter, increases its temperature and results in expansion. It is this property of expansion that allows us to build thermometers. The change in heat energy is determined by temperature change. How much temperature changes is determined by the heat capacity of the substance. | Heat changes state of matter, increases its temperature and results in expansion. It is this property of expansion that allows us to build thermometers. The change in heat energy is determined by temperature change. How much temperature changes is determined by the heat capacity of the substance. |