A) a typical home water heater contains 40 gallons of water. How much heat (in kJ) is required to heat the 40 gallons of water (1 gallon=3.78 liters from room temperature 68F to 122F b) If the water is heated by combustion of natural gas (CH4) with oxygen to produce carbon dioxide and steam, how many moles of natural gas must be burned to heat the water in the water heater? (First write the balanced chemical reaction and calculate the delta H of the reaction.
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.
A) a typical home water heater contains 40 gallons of water. How much heat (in kJ) is required to heat the 40 gallons of water (1 gallon=3.78 liters from room temperature 68F to 122F
b) If the water is heated by combustion of natural gas (CH4) with oxygen to produce carbon dioxide and steam, how many moles of natural gas must be burned to heat the water in the water heater? (First write the balanced
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