Question

Which form of energy is involved in transfer of energy between two bodies due to a temperature difference.

• A. Potential energy
• B. Nuclear energy
• C. Chemical energy
• D. Heat energy
• E. Temperature energy

Answer 1

The correct option is D Heat energy

Heat can be transferred from one place to another by three methods: conduction in solids, convection of fluids (liquids or gases), and radiation through anything that will allow radiation to pass. If there is a temperature difference in a system, heat will always move from higher to lower temperatures.

Conduction is the movement of heat through a substance by the collision of molecules. At the place where the two object touch, the faster-moving molecules of the warmer object collide with the slower moving molecules of the cooler object. As they collide, the faster molecules give up some of their energy to the slower molecules. The slower molecules gain more thermal energy and collide with other molecules in the cooler object.

In liquids and gases, convection is usually the most efficient way to transfer heat. Convection occurs when warmer areas of a liquid or gas rise to cooler areas in the liquid or gas. As this happens, cooler liquid or gas takes the place of the warmer areas which have risen higher.