Difference between Heat and Temperature

Temperature and heat are related, but contrary to popular belief, they do not mean the same thing. Knowing the difference between hot and cold allows us to better understand the world around us. In this article, we will define heat and temperature and understand how they are related, but not the same.

Difference between Heat and Temperature

The reason the concept of heat and temperature can be confused is how closely related they are in real life. When you apply heat to an object, its temperature rises. When you reduce the heat, you take the heat out of it. Let’s see what exactly they represent.

Temperature is the total kinetic energy of the molecules of a substance, and heat is a measure of the average kinetic energy of the molecules in the substance. Temperature depends on factors such as particle velocity, particle size and number of particles. . . .

Temperature, however, has no effect on these factors. For example, let’s compare a tub of water with a cup of water. The water in the tub and the cup should be at the same temperature but because of the number of particles in the tub, the water in the tub has more heat energy and therefore has more heat even at the same temperature.

Temperature is a number related to the energy absorbed by the molecules of matter, which is directly related to the kinetic energy of the particles of matter SI The unit of temperature is the Kelvin.

As we mentioned earlier, temperature is directly related to the kinetic energy of molecules, so when you double the temperature (Kelvin) of a substance, the average kinetic energy those molecules have doubles.


Heat can be transferred between different bodies or between different parts of the body. The study of processes and mechanisms of heat energy transfer is called “heat transfer”.

In order for heat to move between two objects, there must be a difference in temperature. These bodies must be at two different temperatures, one higher than the other, to transfer heat from one to the other.


Temperature is a measure of the degree of heat or intensity of perceived heat. Whenever two bodies at different temperatures are in thermal contact, heat will flow from one at the higher temperature to the other at the lower temperature.

The human body is very sensitive to changes in temperature. However, the sense of touch is only standard. while scientific experiments require that every physical quantity be measurable. Thermometers are called thermometers.

Difference between Heat and Temperature

Heat Temperature
Heat is a form of energy that is transferred between two bodies because of a temperature difference existing between them. Temperature is defined as the measure of the degree of hotness or coolness of any object.
Heat is the total kinetic energy and potential energy obtained by molecules in an object.  Temperature is the average kinetic energy of molecules in a substance.
Heat has a working capacity.  Temperature doesn’t have a working capacity. 
Heat can flow from a hot to a cold object.  Temperature can rise when heated and decreases when an object is cooled down.
The SI unit of Heat is Joule (J) and can also be measured in Calories (Cal). SI unit of temperature is Kelvin (K). Other units of temperature are °C and °F.
Heat can be denoted by the symbol Q. Temperature can be denoted by the symbol T.
The measure of Heat can be done with Calorimeter The measure of Temperature can be done with Thermometer.


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