Calculate $\Delta$U of a gas for a process in which the gas absorbs 19 J of heat and does 49 J of work by expanding.

Question

Quizplus · Accepted Answer

The first law of thermodynamics states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system. Therefore, we can use the equation ΔU = Q - W to solve for the change in internal energy. ΔU = 19 J - 49 J = -30 J. Since F1F1F1S1F1F1F10U is a state function, it only depends on the initial and final states of the system and not on the pathway taken to get there. Therefore, F1F1F1S1F1F1F10U = -30 J. Multiplying by -1 to get the energy change of the surroundings, we get F1F1F1S1F1F1F10U = 30 J, which is the answer E.

Calculate Δ\DeltaΔ U of a Gas for a Process in Which the Which

Calculate $\Delta$ U of a Gas for a Process in Which the Which