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Figure below shows two paths that may be taken by a gas to go from a state A to a state C. In process AB, 400 J of heat is added to the system and in process BC, 100 J of heat is added to the system. The heat absorbed by the system in the process AC will be:
- 500 J
- 460 J
- 300 J
- 380 J
Correct answer: 500 J
Solution
The heat absorbed by the system in process AC is the sum of the heat absorbed in processes AB and BC. Since 400 J is added in AB and 100 J in BC, the total heat absorbed in AC is 400 J + 100 J = 500 J.
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