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Question
Read the following paragraph and answer the questions based on it.
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If heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing due to loss of energy. The change in temperature continues till the temperatures of both the objects attain the same value. In this process, the cold object gains heat energy and the hot object loses heat energy. If the system of both the objects is isolated from the environment by keeping it inside a heat resistant box, then no energy can flow from inside the box or come into the box. |
- Heat is transferred from where to where?
- Which principle do we learn about from this process?
- How will you state the principle briefly?
Solution
- Heat is transferred from a hot body to a cold body i.e., from a higher temperature to a lower temperature.
- We learn the principle of heat exchange from this process.
- The heat energy lost by a hot object is always equal to the heat gained by a cold object provided that the system of both the object is isolated.
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