Question

Why can a substance's specific heat capacity change as the substance changes temperature? (For instance, consider water?)

Answer 1

It does not change.

Explanation:

You may be thinking about a phase change, during which the temperature of the substance does not change while heat is being adsorbed or released.

• Heat capacity is the amount of heat needed to change a substances’ temperature by `1^o`C or `1^o`K. Specific heat is the heat needed to change 1g of substances’ temperature by `1^o`C or `1^o`K.
• Heat capacity is dependent on the amount of substance, but specific heat capacity is independent of it.

http://www.differencebetween.com/difference-between-heat-capacity-and-vs-specific-heat/

Neither changes with a change in temperature.