JEE Mains · Physics · STD 11 - 11. thermodynamics
Given below are two statements: Statement \(I:\) If heat is added to a system, its temperature must increase. Statement \(II:\) If positive work is done by a system in a thermodynamic process, its volume must increase. In the light of the above statements, choose the correct answer from the options given below
- A Statement \(I\) is true but Statement \(II\) is false
- B Both Statement \(I\) and Statement \(II\) are true
- C Both Statement \(I\) and Statement \(II\) are false
- D Statement \(I\) is false but Statement \(II\) is true
Answer & Solution
Correct Answer
(D) Statement \(I\) is false but Statement \(II\) is true
Step-by-step Solution
Detailed explanation
Statement \(I:\) \(\Delta Q > 0\) According to \(1^{\text {st }}\) law of thermodynamics \(\Delta Q =\Delta U + W\) If \(\Delta Q > 0, \Delta U < 0\) and \(W > 0\) is also possible. Hence \(\Delta T < 0\), so \(T\) decreases. Statement \(I\) is false Statement \(II:\) W \( > 0\)…
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