The following chemical equation describes a proposed chemical reaction that does not proceed to form a product: H₂O + Cu→no reaction. Why is that? A. Copper has a lower activity than hydrogen and cannot replace it. B. Copper has a higher activity than hydrogen and cannot replace it. C. The reaction cannot occur because water is a reactant. D. The reaction proceeds too slowly to create products. D
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.
Here is the activity series of metals, in order of decreasing reactivity:
Potassium (K)
Sodium (Na)
Calcium (Ca)
Magnesium (Mg)
Aluminium (Al)
Zinc (Zn)
Iron (Fe)
Nickel (Ni)
Tin (Sn)
Lead (Pb)
Hydrogen (H)
Copper (Cu)
Mercury (Hg)
Silver (Ag)
Gold (Au)
Platinum (Pt)
Metals at the top of the activity series, such as potassium and sodium, are highly reactive and tend to form positive ions very easily. They can react violently with water and other substances, and are therefore often used in chemical reactions as reducing agents.
Metals at the bottom of the activity series, such as copper and silver, are relatively unreactive and tend to form positive ions less easily. They are often used for their resistance to corrosion and their electrical conductivity.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
