Times the delta G, a formation of CuO which is copper two oxide.

Now, let's plug our numbers in.

We have 1 mole times, if you look up there to given numbers,

we have 166.69 kilojoule per mole plus one half a mol times a negative,

oops, no, there's no number given, I was about ready to

put that number in there but there's no number given for oxygen.

So what do we do here?

Well, we have simply got to put in the value that we know it is

even though it's not given, and that would be 0.

Okay, elemental oxygen, any element in its most stable form, has a value of 0.

And now we do -2 moles times a delta G formation of CuO, and

that is a -155.2 kilojoules per mole.