JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry
A system does \(200\,J\) of work and at the same time absorbs \(150 \,\mathrm{~J}\) of heat. The magnitude of the change in internal energy is \(.....\,J.\) (Nearest integer)
- A \(50\)
- B \(55\)
- C \(60\)
- D \(40\)
Answer & Solution
Correct Answer
(A) \(50\)
Step-by-step Solution
Detailed explanation
\(w=-200\, J, q=+150: \Delta U=q+w\) \(\Delta U=150-200=-50\, \mathrm{~J}\) \(\text { magnitude }=50 \,\mathrm{~J}=|\Delta \mathrm{U}|\)
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