Activity 1: Hydrocarbons
Study the Table 1 to 3 then answer the questions that follow.
Table 1. Alkanes
Name
Phase
Condensed Structural Formula
Bolling
Point (°C)
Methane
Gas
CH,
-162
Ethane
Gas
CH3 CH3
-89
Propane
Gas
CH3 CH2 CH
-42
Butane
Gas
CH3 CH2 CH2 CH3
-0.5
Pentane
Liquid
CH3 CH2 CH2 CH2 CHA
36
69
98
Hexane
Liquid
CH3 CH2 CH2 CH2 CH2 CH3
Heptane
Liquid CH, CH2 CH2 CH2 CH2 CH2 CH3
Octane
Liquid CH3 CH2 CH2CH2CH2 CH2 CH2CH3
Source: Science Grade 9 Learner's Module First Edition
126
Table 2. Alkenes
Name
Phase
Condensed Structural
Formula
Boiling
Point (°C)
Ethene
Gas
-104
CH2 CH2
CH2 = CH CH3
Propene
Gas
-47
1-Butene
Gas
CH2
CH CH2 CHS
-6
30
1- Pentene Liquid
CH2 CH CH2 CH2 CH2
1- Hexene Liquid
CH2 CH CH2 CH2 CH2 CH3
Source: Science Grade 9 Learner's Module First Edition
63
Table 3. Alkynes
Naume
Phase
Condensed Structural Formula
Bolling
Point (°C)
-84
Ethyne
Gas
CH2
Pentyne
Liquid
HC = C CH2 CH2 CH3
Source: Science Grade 9 Learner's Module First Edition
40.2
Questions:
Using the table 1 to 3, what pattern do you observe in terms of the phase, number
of carbon atoms, structure and boiling point of alkanes, alkenes and alkynes?
Explain the patterns you observe.​