SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the symbol for heat?
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q
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H
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J
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∘C
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Explanation:
Detailed explanation-1: -Heat is written with the symbol q or Q, and it has units of Joules ( Jstart text, J, end text).
Detailed explanation-2: -For a closed system, one that always consists of the same material, the first law is Q + W = E, where Q is the heat supplied to the system, W is the work done on the system, and E is the increase in energy of the material forming the system.
Detailed explanation-3: -In the “memoir on heat”, already the terminology is used and q is there, after heat being called “quantity of heat”, page 191. The original must have been in french. Assigning symbols to physics quantities depends on the first people who used them a lot, and then convenience follows the serendipity.
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