how much heat transfer (in j) occurs from a system if its internal energy decreased by 300 j while it was doing 16.0 j of work? (enter the magnitude.)

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09-12-2022
Physics

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how much heat transfer (in j) occurs from a system if its internal energy decreased by 300 j while it was doing 16.0 j of work? (enter the magnitude.)

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Tutorconsortium708 Tutorconsortium708 · Answer 1 · 2022-12-16T00:55:42-05:00

The system released 134 J of energy into the surrounding while doing 16 J of work.

What is energy ?

The ability to exert a force that causes an item to move is what is meant by the definition of energy as the "power to accomplish work."

We use thermodynamics principles in this situation. There are already obtained relationships for intense properties like internal energy (U), heat transfer (Q), and work (W) that were based on differential equations. The formula is

ΔU = Q + W

But since these factors depend on their signs, we must remember to take them into account. Van Ness, Smith, and Abbott assert that declining has a negative sign convention. If work is being done ON the system, the sign is positive; however, if work is being done BY the system, the sign is negative. in this instance,

ΔU = -150 J

W = -16 J

Then , we can determine Q as follows

- 150 J = Q - 16 J

Q = - 134 J

Thus 134 J of heat of released by the system into the surroundings.

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