MHT CET 2023 Chemistry question

What is change in internal energy when system releases 8 kJ of heat and performs 660 J of work on the surroundings?

(A)-730 J
(B)-5400 J
(C)-8660 JCorrect
(D)-1212 J

Answer: (C)

Solution

First law: (IUPAC convention: heat absorbed by the system is +, work done on the system is +). The system releases heat, so . The system performs work on the surroundings, so

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-095334