Heat as Energy Transfer - Heat & Thermodynamics Step by Step

Heat is energy transferred because of a temperature difference, not a substance stored inside an object.

highlighted = computed this step

Heat changes a thermal state

The body warms from 300 kelvin to 303 kelvin, a change of 3 kelvin.

\Delta T = 3\ \text{K}

This body needs 10 joules for each kelvin of warming.

C = 10\ \text{J/K}

Multiply 10 joules per kelvin by 3 kelvin. The heat transfer is 30 joules.

Q = C\Delta T = 10\ \text{J/K}\cdot 3\ \text{K} = 30\ \text{J}