What is the reason for heat transfer from one substance to another? a. difference in pressure b. difference in volume c. difference in temperature d. difference in mass

Answer

C. Difference in temperature

Explanation

According to thermodynamics, heat transfer occurs when heat from a high temperature reservoir moves to a low temperature reservoir. For heat to be transferred, the two objects should have different temperatures with one having more temperature than the other. Heat transfer in solids is by conduction, in fluids is by convection and by radiation.

The answer is: C. Difference in temperature

Heat transfers to another substance until the thermal equilibrium is reached, it means that the average temperature between the substance is almost equal or equal. Heat transfer means that the temperature will be transferred from the higher temperature substance to the lower temperature substance.

There are three ways of heat transfer:

- Conduction: When the substances are in contact.

- Convexion: When the heat transfer involves liquid or gas displacement. For example, the sun heating the surface, causing a displacement of warm air and cold air.

- Radiation: When thermal radiation happens, it does not involve any contact between surfaces or substances. For example, the heat transferred by a light bulb.

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