When the amount of work done is 333 cal and change in internal energy is 167 cal, then the heat supplied is
Correct answer: C. 500 cal
- A. 166 cal
- B. 333 cal
- C. 500 cal
- D. 400 cal
Explanation
Correct. Using the first law of thermodynamics: ΔU = Q - W Q = ΔU + W Q = 167 cal + 333 cal = 500 cal
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About First Law of Thermodynamics
The first law relates heat supplied, work done and the change in internal energy through energy conservation. Problems use sign conventions and apply the law to isothermal, adiabatic, isobaric and isochoric processes. Internal energy is a state function, while heat and work depend on the path followed.
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