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You shake a thermos so that the temperature of tea inside increases by 2^oC, if you transferred Q amount of heat to the thermos, which of the following satisfies Q?

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You shake a thermos so that the temperature of tea inside increases by 2^oC, if you transferred Q amount of heat to the thermos, which of the following satisfies Q?

(a) Q > 0

(b) Q < 0

(c) Q = 0

(d) Cannot say

I had been asked this question during an online interview.

Question is from Energy Types topic in chapter Liquids and Gases in Equilibrium with Solids and Energy: Terminology, Concepts, and Units of Basic Chemical Engineering

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Correct option is (c) Q = 0

Easiest explanation: If you are shaking a thermos, you are doing work on it not transferring any heat.

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