Acid rain is the result of the chemical reactions of certain pollutants in Earth’s atmosphere with rainwater. Among the constituents of acid rain are the following ions: H3O+1, SO4-2, and NO3-1. Many lakes in the world act as catch basins of acid rain and contain these ions. When a person throws a chunk of solid calcium carbonate, CaCO3 , into one of these lakes a gas forms on the surface of the solid calcium carbonate. Of the three ions in the lake, which ion is reacting with the solid calcium carbonate? Write the name and formula of the gas formed when solid calcium carbonate reacts with the ion from part ‘a’. Write the net ionic equation showing how solid calcium carbonate and the ion from part ‘a’ forms this gas from part ‘b’. What type of reaction is this? Oxidation-Reduction Acid-Base
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.
H8.
Acid rain is the result of the
Of the three ions in the lake, which ion is reacting with the solid calcium carbonate?
Write the name and formula of the gas formed when solid calcium carbonate reacts with the ion from part ‘a’.
Write the net ionic equation showing how solid calcium carbonate and the ion from part ‘a’ forms this gas from part ‘b’.
What type of reaction is this?
Oxidation-Reduction
Acid-Base
Precipitation
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