Consider a diagram representing a thermodynamic system undergoing a change of state with heat transfer and work done. Which equation correctly represents the change in internal energy, $\Delta U$ , for this system?
A
$\Delta U = q + w$
B
$\Delta U = q - w$
C
$\Delta U = w - q$
D
$\Delta U = q \times w$

Question

Consider a diagram representing a thermodynamic system undergoing a change of state with heat transfer and work done. Which equation correctly represents the change in internal energy, $\Delta U$ , for this system?

A

$\Delta U = q + w$

B

$\Delta U = q - w$

C

$\Delta U = w - q$

D

$\Delta U = q \times w$

Accepted Answer

$ \Delta U = q + w $

Answer

$ \Delta U = q - w $

Answer

$ \Delta U = w - q $

Answer

$ \Delta U = q \times w $

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