What will be the internal energy change when 50 J heat is added to the system and 15 J work is done on the system?

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answer is 65.

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Detailed Solution

We know that; U [First Jaw of thermo dynamics]W=+15 J [∵ work is done on the system]q=50 J.Substituting the values, we get :Δ U=50+15=65J

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