Chemistry! ! ! identify each of the following reactions as a substitution, addition, condensation, or elimination reaction.

Answers:  

1. Condensation; 2. substitution; 3. addition  

Explanation:  

Reaction 1

CH₃CO-OH + H-OCH₃ ⟶ H₂O + CH₃CO-OCH₃  

This is an example of a condensation reaction — a reaction in which two molecules combine and eliminate a simple molecule (usually water or ammonia).  

Here, two larger molecules (CH₃OH and acetic acid) combine by eliminating a molecule of water between them.  

Reaction 2  

CH₃CH₂CH₂CH₂-H + Cl-Cl ⟶ CH₃CH₂CH₂CH₂-Cl + H-Cl  

This is an example of a substitution reaction — a reaction in which one atom or functional group replaces another atom or functional group in an organic compound.  

Here, a Cl atom replaces an H atom in a molecule of butane.  

Reaction 3  

H₂C=CH₂ + Cl-Cl ⟶ Cl-CH₂-CH₂-Cl  

This is an example of an addition reaction — a reaction in which two or more molecules combine to form a larger one.

Here, a chlorine molecule combines with a molecule of ethylene to form a molecule of 1,2-dichloroethane.