Acetylene (C₂H₂(g)) is used for welding because oxyacetylene is the hottest burning common fuel gas. Using standard enthalpies of formation, calculate the quantity of heat produced when 10 g of acetylene is completely combusted in air under standard conditions.

Video transcript

Hey everyone. So here we have a photosynthesis reaction below converting carbon dioxide and water to sugar and oxygen gas. And were asked how much he is consumed. If two g of carbon dioxide was converted to sugar, we need to first calculate the entropy of the reaction. Call that the entropy of the reaction is equal to the sun. Of the number of moles trying to interfere in formation of the products minuses, some the number of moles. The information of the reactant. So for the mp information of carbon dioxide -393 0.5 Children's promote. For the independent information of H 20. With negative 285 0.8 it'll just promote for the entropy information of sugar You have negative 1,273. Hello jules, caramel. For the ndp information of oxygen gas, You have zero kg per mole. So for the entropy of the reaction we're gonna have the entropy of sugar plus six. Time to interpret information of oxygen gas minus six. The interview information of carbon dioxide plus six Has an entropy information at H. 20. For the entropy of the reaction -1273 villagers from all plus six. I'm zero diligence, caramel minus six. I was naked 393 0.5. Well joe's Permal plus six 19, .8 kg Caramel. So for a dozen H of the reaction We're gonna get 2802 0.8. Well jules promote. So now I need to determine how much he is consumed. I have two g of carbon dioxide And in one mall carbon dioxide we have the molar mass, Which is 12.011 g. Us, too, On 15.999 g. Let's give us 44.009 g. We have six moles of carbon dioxide in the equation With the entropy of 2802 .8 Killer Jewels. And this gives us 21.2. Hello jules. Thanks for watching my video and I hope it was helpful.