Stoichiometry & Chemical Reactions
7 terms
Effervescence
Stoichiometry & Chemical Reactions
Dimensionless
The rapid escape of gas bubbles from a liquid during a chemical reaction.
Elimination Reaction
Stoichiometry & Chemical Reactions
Dimensionless
A reaction in which two substituents are removed from adjacent atoms, generating a multiple bond.
R–CH₂–CHX–R → R–CH=CH–R + HX
Endothermic Reaction
Stoichiometry & Chemical Reactions
kJ/mol
A reaction that absorbs energy from the surroundings, giving a positive enthalpy change.
ΔH > 0
Equivalent Weight
Stoichiometry & Chemical Reactions
g/equiv
The mass of a substance that combines with or displaces 1.008 g of hydrogen, 8 g of oxygen or one mole of electrons.
E = M / n-factor
Esterification
Stoichiometry & Chemical Reactions
Dimensionless
The acid-catalysed condensation of a carboxylic acid with an alcohol to form an ester and water.
RCOOH + R′OH ⇌ RCOOR′ + H₂O
Excess Reagent
Stoichiometry & Chemical Reactions
mol
A reactant present in a greater amount than is needed to consume the limiting reagent completely.
n_excess = n_initial − n_reacted
Exothermic Reaction
Stoichiometry & Chemical Reactions
kJ/mol
A reaction that releases energy to the surroundings, giving a negative enthalpy change.
ΔH < 0