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A system receives 575 J of heat and delivers 425 J of work. What is the change in the internal energy (ΔE) of the system?

a. 575 J
b. -150 J
c. 150 J
d. -575 J

1 Answer

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Final answer:

The change in the internal energy of the system is 150 J.

Step-by-step explanation:

The change in the internal energy (ΔE) of a system can be calculated using the first law of thermodynamics, which 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:

ΔE = Q - W

In this case, the system receives 575 J of heat (Q = 575 J) and delivers 425 J of work (W = 425 J). Plugging these values into the equation, we get:

ΔE = 575 J - 425 J = 150 J

Therefore, the change in the internal energy of the system is 150 J (option c).

The change in the internal energy (ΔE) of a system is determined by the first law of thermodynamics, which is given by the formula ΔE = Q - W, where Q is the heat added to the system and W is the work done by the system.

In the given scenario, the system receives 575 J of heat and delivers 425 J of work. Applying the formula: ΔE = 575 J - 425 J, we get ΔE = 150 J.

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