1(a)Calcium carbide (CaC2) reacts with water to produce the highly flammable gas acetylene (C2H2). How many grams of acetylene can be produced from 27.02 grams of calcium carbide and 27.02 grams of water, according to the reaction below? Indicate the limiting reactant, show all work, and round your answer to three significant figures. CaC2 + 2H2O → Ca(OH)2 + C2H2.
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.
1(a)Calcium carbide (CaC2) reacts with water to produce the highly flammable gas acetylene (C2H2). How many grams of acetylene can be produced from 27.02 grams of calcium carbide and 27.02 grams of water, according to the reaction below? Indicate the limiting reactant, show all work, and round your answer to three significant figures.
CaC2 + 2H2O → Ca(OH)2 + C2H2.
(b) onsider that same reaction for the production of acetylene. If you react 282 g of CaC2 with excess H2O, and the reaction actually produces 56.6 g of C2H2, what is the percent yield of the reaction? Show all work and round your answer to three significant figures.
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