Calculate the amount of carbon dioxide that could be produced when
(i) 1 mole of carbon is burnt in air.
(ii) 1 mole of carbon is burnt in 16 g of dioxygen.
(iii) 2 moles of carbon are burnt in 16 g of dioxygen.
The reaction of carbon with oxygen is given as follows:
(i) By observing the above equation, it is understood that when 1 mole of carbon is burnt in air, then the amount of carbon dioxide produced is 44g [Molecular Mass of carbon dioxide].
(ii) In the above equation 32g of oxygen react with 1 mole of carbon, then 44g of carbon dioxide is produced.
32g of Oxygen → 44g of Carbon Dioxide
16g of Oxygen → X g of Carbon Dioxide
X = [44×16]/32
= 704/32
= 22g
Therefore, 16g of oxygen when reacted with 1 mole of carbon we get 22g of CO2.
(iii) Even though 2 moles of carbon is available for reaction but 16g of oxygen can react with only 0.5 moles of carbon to give 22g of CO2. In this oxygen acts as limiting reagent and carbon acts as an excess reagent. So 1.5 moles carbon would be left unreacted.