- Exam
- JEE Main
- Year
- 2023
- Date
- 29 January
- Shift
- Morning Shift
- Subject
- Physics
- Chapter
- Thermodynamics
JEE Main 2023 · 29 January · Morning Shift · Physics · Thermodynamics
Given below are two statements. One is labelled as Assertion A and...
Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : If and represent the heat supplied to the system and the work done on the system respectively. Then according to the first law of thermodynamics .
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 option given below :
Options
- AA is correct but R is not correct
- BA is not correct but R is correct
- CBoth A and R are correct and R is the correct explanation of A
- DBoth A and R are correct but R is not the correct explanation of A
Correct answer
C. Both A and R are correct and R is the correct explanation of A
Step-by-step solution
The first law of thermodynamics is stated as . Since is heat supplied to the system and positive thus, is work done on the system, i.e., negative work.
We know that the first law of thermodynamics deals with work done, and heat energy supplied or removed from a system. Therefore, it is based on the conservation of energy. The law states that energy cannot be created or destroyed; it can only be converted from one form to another.