Heat capacity is the amount of energy needed to raise the temperature of a substance by 1 degree Celsius.
Heat capacity is measured by the amount of heat required to raise the temperature of a substance by a certain amount.
Heat capacity changes with temperature because the amount of energy required to raise the temperature of a substance depends on the amount of thermal energy already present in the substance.
The heat capacity is usually the greatest at the gaseous phase for most substances.
Water has a relatively high heat capacity compared to other substances, meaning it requires more energy to raise its temperature by 1 degree Celsius. This is due to its unique molecular structure and the presence of hydrogen bonds.