What is the balanced equation for the complete combustion of $C_{2} H_{6}$ $"C"_2"H"_6"$ ?

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What is the balanced equation for the complete combustion of $C_{2} H_{6}$ $"C"_2"H"_6"$ ?

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Answer 1 · 2017-04-12T00:53:29

Balanced Equation:

${2C}_{2} H_{6} + {7O}_{2}$ $"2C"_2"H"_6 + "7O"_2$ $\to$ $rarr$ ${4CO}_{2} + {6H}_{2} O$ $"4CO"_2 + "6H"_2"O"$

Explanation:

General rules for balancing combustion equations:

Balance the carbons: If the alkane has an even number of carbon atoms, place a coefficient of 2 in front of its formula, then balance the carbons.
Balance the hydrogens.
Balance the oxygens.

Balance the carbons. Since the formula for the alkane $C_{2} H_{6}$ $"C"_2"H"_6"$ has an even number of carbon atoms, place a coefficient of $2$ $2$ in front of its formula first. Next place a $4$ $4$ in front of the ${CO}_{2}$ $"CO"_2"$ .

$2 C_{2} H_{6} + O_{2}$ $color(red)("2")"C"_2"H"_6 + "O"_2$ $\to$ $rarr$ $4 {CO}_{2} + H_{2} O$ $color(red)("4")"CO"_2 + "H"_2"O"$

Balance the hydrogens.
Place a $6$ $6$ in front of the $H_{2} O$ $"H"_2"O"$ .

${2C}_{2} H_{6} + O_{2}$ $"2C"_2"H"_6 + "O"_2$ $\to$ $rarr$ ${4CO}_{2} + 6 H_{2} O$ $"4CO"_2 + color(red)("6")"H"_2"O"$

Balance the oxygens.
Place a $7$ $7$ in front of the $O_{2}$ $"O"_2"$ .

${2C}_{2} H_{6} + 7 O_{2}$ $"2C"_2"H"_6 + color(red)("7")"O"_2$ $\to$ $rarr$ ${4CO}_{2} + {6H}_{2} O$ $"4CO"_2 + "6H"_2"O"$

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What is the balanced equation for the complete combustion of $C_{2} H_{6}$ $"C"_2"H"_6"$ ?

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What is the balanced equation for the complete combustion of $C_{2} H_{6}$ $"C"_2"H"_6"$ ?