NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Thermodynamics
NEET · Physics · Thermodynamics
Given below are two statements: one is labelled as Assertion (A)...
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): In an isobaric expansion of an ideal gas, the heat supplied to the gas is always less than the work done by the gas.
Reason (R): During an isobaric expansion, the temperature of the ideal gas increases, leading to an increase in its internal energy.
In the light of the above statements, choose the most appropriate answer from the options given below:
Assertion (A): In an isobaric expansion of an ideal gas, the heat supplied to the gas is always less than the work done by the gas.
Reason (R): During an isobaric expansion, the temperature of the ideal gas increases, leading to an increase in its internal energy.
In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- C(A) is correct but (R) is not correct
- D(A) is not correct but (R) is correct
Correct answer
D. (A) is not correct but (R) is correct
Step-by-step solution
In an isobaric process, pressure is constant. For an ideal gas, at constant pressure. During expansion, volume increases, so temperature must increase. This leads to an increase in internal energy (). Thus, the Reason is correct.
According to the first law of thermodynamics, . Since is positive during an isobaric expansion, the heat supplied () must be greater than the work done (). The Assertion states that heat supplied is less than work done, which is incorrect.
Therefore, (A) is not correct but (R) is correct.
Answer: (A) is not correct but (R) is correct
According to the first law of thermodynamics, . Since is positive during an isobaric expansion, the heat supplied () must be greater than the work done (). The Assertion states that heat supplied is less than work done, which is incorrect.
Therefore, (A) is not correct but (R) is correct.
Answer: (A) is not correct but (R) is correct