Question 300: Thermodynamics & KTG

Question

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:

Accepted Answer

Heat supplied to the system $=d Q$
Work done on the system $=-d W$
By the first law of thermodynamics, $d Q=d U+d W$
We done the work, therefore,
$$
d Q=d U+(-d W) = d U-d W
$$
So, both A and R are correct and R is the correct explanation
of A.

Answer

Both A and R are correct but R is not the  correct explanation of A

Answer

Both A and R are correct and R is the  correct explanation of A

Answer

A is correct but R is not correct

Answer

A is not correct but R is correct

Thermodynamics & KTG

Choose the correct answer: