Show all work in the space below. If you don't show work, you will receive no credit: Many people heat there homes with natural gas, CH4. When natural gas is burned by the following unbalanced reaction, heat is given off: CH4 + O2 → CO2 + H2O. If you burn 38.5 g of CH4, a) How many moles of water will be produced? b) How many grams of water will be produced? c) How many molecules of water will be produced? d) If you ran this reaction in lab and produced 38.5 g of water, 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.
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