A combustion reaction involves the reaction of a substance with oxygen gas. The complete combustion of any hydrocarbon (binary compound of carbon and hydrogen) produces carbon dioxide and water as the only products. Octane is a hydrocarbon that is found in gasoline. Complete combustion of octane produces 8 liters of carbon dioxide for every 9 liters of water vapor (both measured at the same temperature and pressure). What is the ratio of carbon atoms to hydrogen atoms in a molecule of octane?
Ratio is incorrect. Write the balanced reaction equation and apply Avogadro’s hypothesis.
2007-09-21 14:50:23 · 3 answers · asked by Tamra 2 in Science & Mathematics ➔ Chemistry
Boy, that's a big fat one. The ratio is correct. For each carbon, one liter of CO2 is produced. Thus, the 9 liters of vapor must 18 hydrogens. The compound is C8H18 (with isomers), and the ration of C to H is 4:9.
2007-09-21 15:01:29 · answer #1 · answered by cattbarf 7 · 0⤊ 0⤋
Let octance be CxHy
, where x and y are integers
CxHy + O2 --------> CO2 + H2O
since ratio of volume of gases = ratio of volume of moles,
equation is now:
CxHy + O2 -------->8 CO2 + 9 H2O
so to balance the equation, x becomes 8 and y becomes 18
C8H18 + 12.5O2 -------->8 CO2 + 9 H2O
2C8H18 + 25O2 -------->16CO2 + 18H2O
2007-09-21 15:01:00 · answer #2 · answered by Anonymous · 0⤊ 0⤋
i think of you ought to take favourite chemistry to earnings the fundamentals exceedingly in case you have not have been given any chemistry historical past. you will not comprehend what is going on. have confidence me I drained to bypass Chem a million (favourite chem) and circulate today to chem 2 (bio/organic and organic chem) and had no clue what grow to be occurring, it grow to be like distant places language!
2016-12-26 21:48:16 · answer #3 · answered by ? 4 · 0⤊ 0⤋