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How many liters of oxygen are necessary for the

combustion of 277L of propane (C,H,) at STP?

C3H8 +502–>3 CO2+ 4 H2O

Sagot :

CintiaSalazar

Taking into account definition of STP conditions and reaction stoichiometry, 1384.992 L of oxygen are necessary for the combustion of 277L of propane at STP.

Reaction stoichiometry

In first place, the balanced reaction is:

C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

  • C₃H₈:  1 mole  
  • O₂: 5 moles
  • CO₂: 3 moles
  • H₂O: 4 moles

STP conditions

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

Moles of propane reacted

You can apply the following rule of three: if by definition of STP 22.4 L of propane is occupied by 1 mole, 277 L is occupied by how many moles of propane?

[tex]moles of propane= \frac{277 Lx1 mole}{22.4 L}[/tex]

moles of propane= 12.366 moles

Moles of oxygen necessary

You can apply the following rule of three: If by reaction stoichiometry 1 mole of propane react with 5 moles of O₂, 12.366 moles of propane react with how many moles of O₂?

[tex]moles of O_{2} =\frac{12.366 moles of propanex5 moles of O_{2} }{1 moles of propane}[/tex]

moles of O₂= 61.83 moles

Volume of oxygen necessary

Finally, you can apply the following rule of three:  if by definition of STP conditions 1 mole of O₂ occupies a volume of 22.4 liters, 61.83 moles occupies how much volume?

[tex]volume=\frac{61.83 molesx22.4 L}{1 mole}[/tex]

volume= 1384.992 L

In summary, 1384.992 L of oxygen are necessary for the combustion of 277L of propane at STP.

Learn more about

the reaction stoichiometry:

brainly.com/question/24741074

brainly.com/question/24653699

STP conditions:

https://brainly.com/question/1186356

https://brainly.com/question/8862004

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