The calorie is defined as 1 cal = 4.186 joule. Why not as 1 cal = 4 J to make the conversions easy?
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Answer:
The calorie is defined as 1 cal = 4.186 joule.
Explanation:
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Heat and work are equal, so on taking 1 c = 4 J, the validity of heat and work equivalence will be defined.
Explanation:
- One calorie is described as the heat needed to lift from 14.5 C to 15.5 C the temperature of 1 g liquid.
- Exactly 4,186 J of work on heating 1 g of liquid from 14.5 C to 15.5 C is also to be completed.
- We can not however round-off 4.186 J to 4 J because it would make a huge difference in the work done to increase the temperature and heat required to produce the temperature.
- Since here heat and work are equal, so on taking 1 c = 4 J, the validity of heat and work equivalence will be defied.
- Therefore, one calorie should not be taken equivalent to 4 J only to make conversion simple.
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