reaction CH₂ CH₂OH (1) + 30, (g) 200₂ (g) + 3H₂O(g) FeSO₂ (aq) + PbCl₂ (aq) → FeCl₂ (aq) + PbSO₂ (s) CaCO; (s) → CaO(s) + CO, (g) CH₂(g) +20₂(g) CO₂(g) + 2H₂O(g) type of reaction (check all that apply) combination O single replacement O double replacement decomposition combination O single replacement Odouble replacement decomposition combination single replacement double replacement decomposition combination single replacement double replacement Odecomposition X precipitation combustion acid-base precipitation combustion acid-base precipitation combustion acid-base precipitation combustion 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.
![Classify each chemical reaction:
CH₂ CH₂OH() + 30, (g) 200₂ (g) + 3H₂O(g)
reaction
FeSO (aq) + PbCl₂ (aq) → FeCl₂ (aq) + PbSO₂ (s)
-
CaCO3(s) → Cao(s) + CO₂(g)
CH₂(g) + 20₂(g) → CO₂(g) + 2H₂O(g)
-
Explanation
Check
type of reaction
(check all that apply)
combination
single replacement
double replacement
Odecomposition
combination
single replacement
double replacement
decomposition
combination
single replacement
double replacement
decomposition
combination
single replacement
double replacement
decomposition
X
precipitation
combustion
acid-base
precipitation
combustion
acid-base
precipitation
combustion
acid-base
precipitation
combustion
acid-base
S
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- In a Rxn , When two or more substances combine to form a new substance then this type of reaction is called combination reaction .
- In a Rxn , when a compound breaks up into two or more simpler substances then this type of reaction is called decomposition reaction.
- In a reaction when element takes the place of another element in a compound then this reaction is called single replacement reaction.
- When two or more compounds reacts to form two or more new compounds by mutual exchange of atom or group of atoms then this type of reaction is called double replacement reaction.
- Hydrocarbon compounds react with oxygen to form carbon dioxide & water and heat and light this type of reaction is called combustion reaction .
- When an acid reacts with a base results in the formation of salt and water this type of reaction is called neutralization reaction.
- When two or more compounds reacts to form two or more new compounds in which one of the product formed is in solid state then this type of reaction is called Precipitation reaction.
- A reaction in which oxidation & reduction occurs simultaneously are called Redox reaction ( oxidation - reduction reaction.
- Precipitation reaction and neutralization reaction are example of double displacement reaction
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