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State two factors upon which the heat absorbed by a body depends.

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Last updated date: 17th Jun 2024
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Answer
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Hint: Heat is a form of energy. The heat energy is absorbed by some bodies and dissipated by some. So it must depend upon the physical factors in which the body is present or the system. Additionally, it must depend upon the material of the body too in some way.

Complete step by step answer:
When two bodies at different temperatures are placed in contact, the hotter body tends to cool down and the cooler body warms up. Energy is thus transferred from a body at a higher temperature to a body at a lower temperature when they are brought in contact.
The energy being transferred between the two bodies or maybe between two adjacent parts of a body as a result of temperature difference is known as heat.
Thus, heat is a form of energy that is in transit whenever temperature differences exist. Once it is transferred it becomes the internal energy of the receiving body. The SI unit of heat energy is the joule. However, another widely used unit for heat is a calorie.
Factors on which the heat absorbed by a body depends are:
(1) Mass of the body
When we supply heat to a body, its temperature increases. The amount of heat absorbed depends on the mass of the body. The heat energy absorbed is directly proportional to the mass of the body.

Mathematically, $Q \propto M$
where Q is the amount of heat absorbed,
M is the mass of the body.

(2) The change in temperature
The amount of heat absorbed by a body is also directly proportional to the change in the temperature or the rise in the temperature. So if a body absorbs more heat energy than the temperature difference is greater.

Mathematically, $Q \propto \Delta \theta $
where Q is the amount of heat absorbed,
$\Delta \theta $is the change in temperature.

Note: The amount of heat absorbed by a body also depends on a constant which is material-specific in nature known as the specific heat capacity of a substance. Additionally, when a solid or a liquid is kept in open in the atmosphere and heated, the pressure remains constant.