Hlendmo 7. Writing and Balancing Reactions. Write and Balance the following reactions with the information given. A. Solid calcium reacts with oxygen to form calcium oxide. HOWS CHA sH s(HO)uo -OsHS B. Solid sodium hypochlorate is heated, it decomposes to form solid sodium chloride and oxygen gas. SOSH Sabeer tait er ni beouben Jnemels art bns besibixo Inemele eril yhtnebl leini ob of Inemete noes of eiodmon noilsbixo nigleeA C. Hydrogen sulfide gas is passed over solid hot lead (III) hydroxide, the resultant reaction produces solid lead (III) sulfide and gaseous water.
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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