The production capacity for acrylonitrile (C₂H₂N) in the United States exceeds 2 million pounds per year. Acrylonitrile, the building block for polyacrylonitrile fibers and a variety of plastics, is produced from gaseous propylene, ammonia, and oxygen. 2 C₂He(a) + 2NH3(g) + 30₂(g) → 2 C₂H₂N(g) + 6H₂O(g) (a) What mass of acrylonitrile can be produced from a mixture of 1.12 kg of propylene (CH), 1.64 kg of ammonia, and 1.67 kg of oxygen, assuming 100% yield? 19 (b) What mass of water is produced? Te Which starting materials are left in excess? (Select all that apply.) propylene ammonia oxygen What mass of propylene is left in excess? 0 9 What mass of ammonia is left in excess? 19 What mass of oxygen is left in excess? 9
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.
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