What is the change in internal energy if 70 J of heat is added to a system and the system does 30 J of work on the surroundings? Use A

Question

What is the change in internal energy if 70 J of heat is added to a system and
the system does 30 J of work on the surroundings? Use AU = Q-W.
A. -40 J
B. -100 J
C. 100 J
O D. 40 J

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niczorrrr 1 year 2021-09-03T22:13:58+00:00 1 Answers 21 views 0

Answers ( )

    0
    2021-09-03T22:15:39+00:00

    Answer:

    Change in internal energy AU = 40 J

    Explanation:

    Given:

    Amount of heat added = 70 J

    Work done = 30 J

    Find:

    Change in internal energy AU

    Computation:

    The net thermal conductivity into a process less the net work performed by the system represents the shift in internal energy.

    Change in internal energy AU = Q – W

    Change in internal energy AU = 70 J – 30J

    Change in internal energy AU = 40 J

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