Octanitrocubane (“ONC”), C8(NO2)8(s), is one of the most powerful explosives that, like TNT, is shock-insensitive (not detonated by shock). When detonated, ONC forms carbon dioxide gas and nitrogen gas according to the reaction: C8(NO2)8(s) ⟶ 8 CO2 + 4 N2. A container is filled with 88.0 g of CO2 and 56.0 g of N2, what mass of ONC can be produced, assuming a 100. % yield? As you work this problem, make sure to (a) identify the limiting reagent and (b) determine the amount (in moles) of excess reagent. If 87.0 grams of ONC were produced, what is the percent yield?
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Octanitrocubane (“ONC”), C8(NO2)8(s), is one of the most powerful explosives that, like TNT, is shock-insensitive (not detonated by shock). When detonated, ONC forms carbon dioxide gas and nitrogen gas according to the reaction: C8(NO2)8(s) ⟶ 8 CO2 + 4 N2. A container is filled with 88.0 g of CO2 and 56.0 g of N2, what mass of ONC can be produced, assuming a 100. % yield? As you work this problem, make sure to (a) identify the limiting reagent and (b) determine the amount (in moles) of excess reagent. If 87.0 grams of ONC were produced, what is the percent yield?
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