Calculate the volue of `O_(2)` at 1 atm and 273 K required for the complete combustion of 2.64 L of acetylene `(C_(2)H_(2))` at 1 atm and 273 K. `2C_(2)H_(2)"(g)"+5O_(2)"(g)"rarr4CO_(2)"(g)"+2H_(2)O(l)`

Options

A. 3.6 L
B. 1.056 L
C. 6.6 L
D. 10 L

Answer

c

Explanation

(c) `n_(c_(2))H_(2)=(PV)/(RT)=(1xx2.64)/(0.0821xx273)=0.118"mole"`
`n_(O_(2))=(5)/(2)xx0.118=0.294`
`V=(nRT)/(P)=6.6L`