A system gives out 30 J of heat and does 76 J of work. What is the internal energy change?
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A system gives out 30 J of heat and does 76 J of work. What is the internal energy change?
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Answer:
ΔU = q + w
ΔU = − 30 − 75 = − 105J
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Hey there!
∆Q = - 30 J [heat released]
∆W = -76 j [ work done by the system]
Now as you know :
∆U = ∆Q + ∆W
∆U = -30 + (- 76)
∆U = (-106) J
Hence the change in internal energy is -106 joules.
Hope it helps! :)