How many liters of methane gas (CH4) need to be combusted to produce 12.4 liters of water vapor, if all measurements are taken a

Question

3 years ago

7

How many liters of methane gas (CH4) need to be combusted to produce 12.4 liters of water vapor, if all measurements are taken a

t the same temperature and pressure? Show all of the work used to solve this problem.
CH4 (g) + 2O2 (g) yields CO2 (g) + 2H2O (g)

Chemistry

1 answer:

ElenaW [278] · Answer 1 · 2022-07-30T16:14:03+03:00

Since litres is the subject of the question, molar mass will be considered in litres.
Since the question didn't specify if it was a complete combustion or incomplete combustion, we assume that it is a complete combustion.
Mr(CH4) =16
Mr (O2)= 32
Mr(H20)=18
so, 16 litres of methane will produce 36 litres of water vapour. How many litres of methane will combust to produce 12.4 litres of H20?
Cross multiply.
(12.4 x 16) / 36 = 5.51 litres.