A closed tank contains 20 lb of water. If 200 Btu are added to the water, what is the change in
internal energy of the water?
According to the principle of the conservation of energy, total energy of the system plus
surroundings can neither be created nor destroyed. For a closed system, energy balance relation is
given by the equation
According to the given data, work done on the closed tank is W =200 . Since no heat is added
to the system Q=0
so Delta E = 0 + 200 = 200
Alex Pepsega Indra Putra
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