What is the change in internal energy (E) when system is heated with 35 J of...

Question

Question

What is the change in internal energy (E) when system is heated with 35 J of energy while it does 15J work

Answer 1

Answer #1

Q = +35 J (since heat is absorbed)

W = -15 J (since work is done by the system)

use:

delta U = Q + W

= 35 J - 15 J

= 20 J

Answer: 20 J

Internal energy INCREASES by 20 J

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Answer 2

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