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If 50 calories are added to a system and system does work of 30 calories on surroundings, the change in internal energy of system is

A

20cal

B

50cal

C

40cal

D

30cal

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Text Solution
Verified by Experts

The correct Answer is:A


q=ΔE+w
50=ΔE+30
ΔE=20cal

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Updated on:21/07/2023

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