a system absorb 500 J of heat and does work of 50 J on surrounding calculat change in internal energy
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The change in the internal energy = 550 J
Explanation:
According to law of thermodynamics,
dU = dQ - dW
dU = Change in internal energy
dQ = Heat energy absorbed by the system
dW = Work done by the system
dQ = + 500 J
dW = - 50 J (As the work done is on the surroundings we get a negative sign)
On substituting the values
dU = 500 - (- 50)
dU = 500 + 50 = 550
Therefore the change in internal energy is 550 J
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