signment for Exp . Types of enemen 1. Balance and classify the following reactions as a synthesis (SY), decomposition (D), single replac (SR), double replacement (DR) or combustion (CO) reaction: Chemical Equation # 1 2 3 Ba + NaClO3 Ag + CaCl₂ + → N₂ → H₂S - NaCl + Na3PO4 ->>> Ba3N2 0₂ Ag₂S + H₂ CA3(PO4)2 + NaCl Classificat pero
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.
Synthesis reaction : When multiple simple reactants combine to form one single and complex product, then it is called synthesis reaction.
For example -
A + 2B --> AB2
Decomposition : When a single chemical entity breaks down and forms two or more fragments, then it is decomposition reaction.
AB 2 C --> A + 2B + C
Single replacement : When one element in a compound is replaced by another element, then it is single replacement reaction.
A + BC --> AC + B
Double replacement : When two reactants react and the cations and anions exchange their position to make 2 new products, then it is double replacement reaction.
AB + CD --> AD + CB
Combustion reaction : It is a chemical reaction, where any fuel undergoes oxidation with oxidising agent resulting in heat.
Generally hydrocarbons react with oxygen to give carbondioxide, water and heat.
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