Chemical Properties and Interchange Between Homologous Series (2)

Chemistry

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Chemical Properties and Interchange Between Homologous Series (2)

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Chemical properties of alkane in term of combustion reaction (1)

Alkanes burn completely in excess oxygen, O2, releasing carbon dioxide, CO2 and water, H2O

Example of a complete combustion of methane

For example, a complete combustion of methane, CH4 in excess oxygen, O2 occurs as follows: - CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O(l)

Chemical properties of alkane in term of combustion reaction (2)

Alkanes undergo incomplete combustion when there is not enough or limited supply of oxygen, O2

Chemical properties of alkane in term of combustion reaction (3)

Incomplete combustion of alkanes produces carbon particles, C (in the form of soot), carbon monoxide gas, CO which is poisonous, and water, H2O

Example of incomplete combustion of alkane

An example of an incomplete combustion of methane, CH4 occurs as follows: - 2CH4 (g) + 3O2 (g) → 2CO(g) + 4H2O(l) - CH4 (g) + O2 (g) → C(s) + 2H2 O(l)

Chemical properties of alkane in term of combustion reaction (4)

The combustion of alkanes release large amounts of heat

Chemical properties of alkane in term of combustion reaction (5)

The combustion of alkanes with more number of carbon atoms, C will produce more soot

The reason for suitability of alkane to be used as fuel

The combustion of alkanes release large amounts of heat

Step to balance the equation for combustion (1)

Step 1: Balance C

Step to balance the equation for combustion (2)

Step 2: Balance H

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