Chemical Properties Of Alkanes (LEC)
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Alkanes as well as other hydrocarbons undergo Combustion with the oxygen. What is Combustion?
Combustion is the burning in the presence of oxygen.
What does combustion of alkanes produce and evolve into?
RH + 2O2 = CO2 + 2H2O + # kcal, wherein; • Carbon dioxide and water are the chemical products, and • Heat energy is evolved form of combustion
Evolved heat energy can be converted to:
Mechanical and electrical energy
Alkanes are relatively inert; therefore, they are non-reactive with __________
Aqueous reagents, such as water solution of acids, bases, oxidizing agents, reducing agents, etc.
Alkanes react only in these conditions:
• With powerful reagents, • Under conditions of high temperatures, and; • Under pressure or in presence of catalysts
This test is used to differentiate unsaturated hydrocarbons from saturated hydrocarbons.
Baeyer’s Test for Unsaturation
In Baeyer’s test, what reagent is used?
Potassium Permanganate or KMnO4
What results when alkanes are tested with Baeyer’s test?
• Alkanes do not react because they are saturated— the test doesn’t work Only works with unsaturated hydrocarbons