# Problem: Which of the designs violate(s) the first law of thermodynamics?

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###### FREE Expert Solution

The first law of Thermodynamics:

$\overline{){\mathbf{∆}}{\mathbf{U}}{\mathbf{=}}{\mathbf{Q}}{\mathbf{+}}{\mathbf{W}}}$

ΔU is the change in internal energy, Q is the heat transfer, and W is the amount of work done.

###### Problem Details

Which of the designs violate(s) the first law of thermodynamics?