The heat capacity of an object depends in part on its

enthalpy
mass
potential energy***
shape

The heat capacity of an object depends in part on its mass. To understand why, let's first define what heat capacity is. Heat capacity is the amount of heat energy required to raise the temperature of an object by a certain amount.

Now, let's consider two objects with the same material but different masses. If we want to raise the temperature of both objects by, let's say, 10 degrees Celsius, we would need to transfer different amounts of heat energy to each object.

The object with a greater mass would require more heat energy to raise its temperature by 10 degrees Celsius because it has more particles that need to absorb this heat energy. This is because heat energy is transferred at the particle level, and the more particles there are, the more heat energy is needed to raise the temperature of the entire object.

On the other hand, the object with less mass would require less heat energy to achieve the same temperature increase because it has fewer particles to heat up.

Therefore, we can conclude that mass is an important factor in determining the heat capacity of an object.