A coal used in a power station contains 1% by mass of sulfur. When this coal is burned the pollutant gas sulfur dioxide is produced. Calculate the mass and volume of sulfur dioxide formed when 20 000g of this coal are burned completely in air.
Qn : The coal burn with oxygen? And only the sulfur react with the oxygen to form sulfur dioxide?
In fact, you do not have to consider what the composition is.
The question is only asking when 20g x 1/100=0.2g of sulfur burns completely in oxygen, what is the mass/volume of sulfur dioxide produced?
Yes. It's a straight forward question.
Coal is a black mineral found underground. Should not confuse with charcoal which is made from wood. The burning of coal produces a lot of energy in terms of heat, which is use to drive the steam turbine in power station to generate electricity.
1% by mass of sulfur .From here, you can calculate the mass of sulfur in coal which is
20 000g x 1% = 200g
Chemical equation:
S + O2 -> SO2
No. of mol of Sulfur = 6.25mol
The reaction produces equal mol of sulfur dioxide, meaning 6.25mol SO2 produce during the reaction.
Mass of SO2 = 6.25 x 64g = 400g
Volume of SO2 = 6.25 x 24 = 150 dm3
24 being the molar volume.
Kk Thanks! I think this qn is from last year Os. I kind of dont understand the qn at first .