physics/chemistry(Thermodynamics)!!!!!helppppp!

In a certain chemical process,a lab technician supplies 254 j of heat to a system. At the same time,73 j of work are done on the system by iys surroundings.What is the increase in the internal energy of the system?

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  1. 254-(-73)=327

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  2. Since heat is supplied to a system Q=+ve = + 254J = 254J
    Since workdone on the system so workdone is negative
    Then W= - 73 J
    Then change in internal energy ∆U= 254-(-73) = 327 Joule

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