This document provides an overview of organic hydrocarbons including alkanes, alkenes, and alkynes. It defines their key characteristics such as chemical formulas and bond structures. Alkanes contain only single bonds between carbons and have the general formula CnH2n+2. Alkenes contain at least one double bond and have the formula CnH2n. Alkynes contain at least one triple bond and have the formula CnH2n-2. Examples of specific hydrocarbons and their drawings are provided, along with questions for students.

1. Regents Chemistry
Unit 7- Organic
Hydrocarbons:
Alkanes, alkenes,
and alkynes
Day 2

2. Hydrocarbons-
contain only
carbon and
hydrogen

3. Table Q- Extremely useful… use it!!

4. Alkanes
Saturated hydrocarbons- full of Hs
(only single bonds)
More carbons= higher boiling pt
CnH2n+2

5. •What is the formula for
octane
• Draw octane

6. Whiteboard question:
•What is the formula for
octane
• Draw octane

7. Alkenes (used to make plastics)
•Must contain at least one
double covalent bond
•CnH2n
•Unsaturated due to the
= double bond
•Why isn’t there a
methene?

8. •What is the formula for hexene?
•Draw hexene.

9. Alkynes- includes ethyne (acetylene for welding)
•Unsaturated due to the triple bond
•Must have at least one triple bond
•Formula is CnH2n-2
•does
methyne exist?

10. •What is the formula for
3-heptyne?
•Draw 3-heptyne