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http://imageshack.us/a/img402/3349/asdasdamx.jpg [Broken]

The first part of the question was actually to find the entropy, but it wasn't so hard so I put the answer at the bottom of the picture.

I'm having trouble understanding what part b) is asking / what to do for it.

dU= dQ - dW = dQ -m dB

Adiabatically dQ = 0

dU = -m dB

So doesn't that mean that the temperature will stay the same if B is decreased slowly?

Thanks - greg

The first part of the question was actually to find the entropy, but it wasn't so hard so I put the answer at the bottom of the picture.

I'm having trouble understanding what part b) is asking / what to do for it.

dU= dQ - dW = dQ -m dB

Adiabatically dQ = 0

dU = -m dB

So doesn't that mean that the temperature will stay the same if B is decreased slowly?

Thanks - greg

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