# Chemistry

A mixture of ethane and ethene occupied 35.5 L at 1.000 bar and 405 K. This
mixture reacted completely with 110.3 g of O2 to produce CO2 and H2O.
What was the composition of the original mixture? Assume ideal gas
behavior

1. 0
2. 0
3. 3
1. Write balanced equations for the combustion of ethane and ethene. I have
2C2H6 + 7O2 ==> 4CO2 + 6H2O
C2H4 + 3O2 ==> 2CO2 + 2H2O

Use PV = nRT and solve for mols of the ethane + mols ethene.
Let X = mols ethane
and Y = mols ethene

Then X + Y = mols from above. This is equation 1.

For equation 2, convert mols C2H6(that's X) and mols C2H4(that's Y) to mols O2 needed for combustion.
X*(7/2) + Y*(3/1) = 110.3/32

Solve for two equation simultaneously for X and Y and that will give you mols. Since the problem asks for composition, I would think moles is as good an answer as you want; however, you can convert mols of each to L by using PV = nRT and the conditions of the problem. Post your work if you get stuck.

1. 0
2. 0
posted by DrBob222

## Similar Questions

1. ### Physical Chemistry

A mixture of ethane and ethene occupied 35.5 L at 1.000 bar and 405 K. This mixture reacted completely with 110.3 g of O2 to produce CO2 and H2O. What was the composition of the original mixture? Assume ideal gas behavior
2. ### Chemistry

A mixture of ethane and ethene occupied 35.5 L at 1.000 bar and 405 K. This mixture reacted completely with 110.3 g of O2 to produce CO2 and H2O. What was the composition of the original mixture? Assume ideal gas behavior Im
3. ### chemistry

132gram o2 is required for a combustion of 28 liter mixture of ethane and ethene (at NTP) than find out mole fraction of ethane and ethene in the mixture?
4. ### science/ chemistry

Over 80 000 vehicles per day pass the site and the traffic is frequently congested. The surrounding area is described as forming a street canyon. The temperature at the site had reached 25 °C by 08:00, when the ethane
5. ### CHEMISTRY: URGENT

30cm^3 of a mixture of methane and ethane were mixed with 100cm^3 of oxygen at ordinary temperature and pressure and exploded. After cooling the residual gases occupied 61.5cm^3. Find the percentage by volume of each gas in the
6. ### Thermodynamics

What is the ideal work for the separation of an equimolar mixture of methane and ethane at 175 C and 3 bar into product streams of pure gases at 35 C and 1 bar if Tsigma = 300 K?
7. ### AP Chemistry

The reaction of the molecules to produce ethane is C2H4(g) + H2(g) ÃƒÂ¢Ã¢â‚¬Â Ã¢â‚¬â„¢ C2H6(g). A mechanism for this reaction is shown below: (The figures show how the ethene molecule with two hydrogen
8. ### chemistry

Which of the following will lie flat on a plane? Methane, ethane, ethene, ethyne, chloromethane?
9. ### Chemistry

Which compound is a saturated hydrocarbon? ethane ethene ethyne ethanol Thanks for any help you can give
10. ### Chemistry

Calculate enthalpy of the reaction ethene+hydrogen gives ethane are -1410KJ,-286kJ and -1560KJ respectively at 25°c

More Similar Questions