When a certain amount of ethylene was combusted, 6226 kJ heat was evolved. If heat of combustion of ethylene is 1411 kJ, the volume of `O_(2)` (at STP) that entered into the reaction is :

Options

A. 296.5 ml
B. 296.5 litre
C. `6226 xx 22.4 litre
D. 22.4 litre

Answer

B

Explanation

No.of moles of enthylene combusted `= (6226)/(1411) = 4.4`
`rArr` No. of moles of `O_(2)` used `=3 xx 4.4` accroding to balanced eq. `C_(2)H_(4) + 3O_(2) rarr 2CO_(2) + 2H_(2)O`
`:.` volume of `O_(2)` used `=3 xx 4.4 xx 22.4` lit at N.T.P