When $1 \ mole$ of gas is heated at constant volume and heat supplied is $500 \ J$,then which of the following is correct?
- A$\Delta U = -0.5 \ J, q = -500 \ J$
- B$q = -500 \ J, \Delta U = 0$
- C$q = 500 \ J, w = 0$
- D$w = 500 \ J, \Delta U = 0$
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