3000 J of heat is added to a system and 2500 J of work is done by the system. What is the change in internal energy of the system.
ΔU=Q−W\Delta{U}=Q-WΔU=Q−W ,
where Q is the heat added to the system, and W is the work done by the system. Therefore,
ΔU=3000J−2500J=500J\Delta{U}=3000J-2500J=500JΔU=3000J−2500J=500J
Answer: 500 J
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