Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: If $d Q$ and $d W$ represent the heat supplied to the system and the work done on the system respectively. Then according to the first law of thermodynamics $d Q=d U-d W$.
Reason R: First law of thermodynamics is based on law of conservation of energy.
In the light of the above statements, choose the correct answer from the options given below:
Solution
Heat supplied to the system $=d Q$
<br/><br/>Work done on the system $=-d W$
<br/><br/>By the first law of thermodynamics, $d Q=d U+d W$
<br/><br/>We done the work, therefore,
<br/><br/>$d Q=d U+(-d W) = d U-d W$
<br/><br/>So, both A and R are correct and R is the correct explanation
of A.
About this question
Subject: Physics · Chapter: Thermodynamics · Topic: Zeroth and First Law
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