Question

What is true of chemical equation?c3H+o2 H2o+co2

Answer 1

1) The first reactant is incomplete.

2) The reaction is a combustion reaction and it is easy to infere that it is the combustion of the alkane with 3 carbons.

3) The general chemical formula of the alkanes is

`C_nH_(2n+2)`

4) Hence the equation is:

`C_3H_8+O_2->H_2O+CO_2`

5) The name of the alkane is propane, so the word equation is:

propane + oxygen → carbon dioxide + water

6) The equation is unbalanced. This is the balanced equation:

`C_3H_8+5O_2->4H_2O+3CO_2`

7) It is, as the combustion of any hydrocarbon, a redox (reduction-oxidation) reaction, where the carbon is oxidized and the oxygen is reduced.

8) This kind of reactions release a lot of energy.