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| Units of Heat Energy |
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| Heat being a form of energy can be measured. What is the unit of heat energy? |
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| In CGS system, heat is measured in calories. Calorie is defined as 'the heat energy required to
increase the temperature of 1gm of water through one degree Celsius'. |
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| In SI system, heat energy is measured in joules (J). Infact, in SI system all forms of energy is measured in joules. |
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| One calorie = 4.185 joules. |
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| A larger unit called Kilocalorie is also in use. 1
kilocalorie = 1000 calories. |
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| Energy contents of food is usually measured in kilocalories. The calories counted in food are actually kilocalories.
For example, the energy value of 100 g of baked potato is equal to 100
calories or 100 kilocalories.. |
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| Table gives the food value of some of the common foods |
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