 Yeah, so this is a manipulation. I guess problem number 11 on the practice exam How much energy is released when 2.00 oh moles of oxygen is bar Okay, well here. We've got 11 moles being burned Right, and it gives us that much energy. So we're gonna have to see how many two moles gives us So we'll say Delta H of Equals well the original Delta H is negative 41 30 kilojoules per 11 two right So for every 11 moles, right? We have negative 4,130 kilojoules being burned so if instead We want that to be two moles Also to cancel out If you only allowed two moles of oxygen into this system you would get negative 750.9 kilojoules of energy