The amount of energy required to raise the
temperature of 1 kilogram of a substance by 1 Kelvin is called the specific
heat. The answer is a. For example, water. Water has a specific heat of 4.18
Joules per kilogram per Kelvin. This means that in order for water to change from
one state to the other at one kelvin, it needs 4.18 Joules of energy per one
kilogram of water. But it does not apply to changes in phase, because the heat
added or removed during a phase change does not change the temperature of a
substance.
