Question

Check Attachment for Question

Answer 1

@princed

Answer 2

25.5 x (-889)/64=

Answer 3

Where'd the 64 come from?

Answer 4

i dont know the question sorry :(

Answer 5

2O2

Answer 6

That's okay, Prince, thanks. :)

Answer 7

the delta H that you have there is defined as the equation is written
if you have 2moles of oxygen that is the heat that the reaction is releasin for each 2 moles of O2
then your problem wants to calculate not for 2 moles of O2 but for 25.5g of O2 then you have to calculate how many moles of O2 do you have in 25.5g.

Answer 8

~0.796mol O2?

Answer 9

yep!

Answer 10

Then I multiply by the enthalpy change and divide by 2?

Answer 11

yes dear! you are a rocket scientist now!

Answer 12

Thanks :)