Question #18776

octane burns completely in oxygen according to the equation

2C8H18 + 25O2 = 16CO2 =18H20

[a) calculate the volume of oxygen i.e. needed for the comp. combustion of 1 dm3 of octane vapor

b) what mass of water vapor will be formed

2C8H18 + 25O2 = 16CO2 =18H20

[a) calculate the volume of oxygen i.e. needed for the comp. combustion of 1 dm3 of octane vapor

b) what mass of water vapor will be formed

Expert's answer

V(C_{8}H_{18}): V(O_{2}) = 2 : 25

V(O_{2}) = 1 dm^{3} * 25/2 = 12.5 dm^{3}

m = n * M;

n = V/ Vm

n(C_{8}H_{18}) = 1dm^{3}/22.4 dm^{3}/mol = 0.0446 mol;

n(H_{2}O) = 0.0446mol *18/2 = 0.4 mol

m(H_{2}O) = 0.4 mol * 18 g/mol = 7.22 g

V(O

m = n * M;

n = V/ Vm

n(C

n(H

m(H

## Comments

## Leave a comment