Combustion of natural gas (primarily methane) occurs in mosthousehold heaters. The heat given off in this reaction is used toraise the temperature of the air in the house. Assuming that allthe energy given off in the reaction goes to heating up only theair in the house, determine the mass of methane required to heatthe air in a house by 10.0 °C. Assume that the house dimensionsare 30.0 m * 30.0 m * 3.0 m; specific heat capacity of air is30 J/K # mol; and 1.00 mol of air occupies 22.4 L for alltemperatures concerned.
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.
Combustion of natural gas (primarily methane) occurs in most
household heaters. The heat given off in this reaction is used to
raise the temperature of the air in the house. Assuming that all
the energy given off in the reaction goes to heating up only the
air in the house, determine the mass of methane required to heat
the air in a house by 10.0 °C. Assume that the house dimensions
are 30.0 m * 30.0 m * 3.0 m; specific heat capacity of air is
30 J/K # mol; and 1.00 mol of air occupies 22.4 L for all
temperatures concerned.
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