Concepts Of Physics MCQ Edition [Volume 2]
- Exam
- Concepts Of Physics MCQ Edition [Volume 2]
- Subject
- Physics
- Chapter
- Laws of Thermodynamics
Concepts Of Physics MCQ Edition [Volume 2] · Physics · Laws of Thermodynamics
Two processes A and B on a system are illustrated in the figure....
Two processes and on a system are illustrated in the figure. Let and denote the heat given to the system during processes and , respectively. Then

Options
- A
- B
- C
- D
Correct answer
A.
Step-by-step solution
According to the first law of thermodynamics, .
Since both processes and start from the same initial state and end at the same final state, the change in internal energy is the same for both processes.
The work done by the system is equal to the area under the curve. From the given graph, the area under the curve for process is greater than the area under the curve for process . Thus, .
Therefore, the heat given to the system during process is greater than that during process , i.e., .
Since both processes and start from the same initial state and end at the same final state, the change in internal energy is the same for both processes.
The work done by the system is equal to the area under the curve. From the given graph, the area under the curve for process is greater than the area under the curve for process . Thus, .
Therefore, the heat given to the system during process is greater than that during process , i.e., .