Thursday, June 7, 2012

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.

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.

 Answer
The balanced reaction of combustion of carbon can be written as:
      C +  O2 ----------------> CO2
     1       1                          1 
(i) As per the balanced equation, 1 mole of carbon burns in1 mole of dioxygen (air) toproduce1 mole of carbon dioxide.
 
(ii) According to the question, only 16 g of dioxygen is available. Hence, it will react with 0.5 mole of carbon to give 22 g of carbon dioxide. Hence, it is a limiting reactant.
 
(iii) According to the question, only 16 g of dioxygen is available. It is a limitingreactant. Thus, 16 g of dioxygen can combine with only 0.5 mole of carbon to give 22 g of carbon dioxide.

8 comments:

  1. (iii)point is not clear at all ...

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    Replies
    1. Natalie Bradshaw (Nat)August 28, 2014 at 1:32 AM

      ur in which class?

      Delete
  2. 0.5 ?
    Where Is This Come From?

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    Replies
    1. 3 point is clear... whether we take 2 moles or 3 moles 16g of o2 will react only with 0.5 moles of carbon. Tgis remain unchanged as only limited oxygen is available

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    2. 32 g of o2 = 1mole
      16g of o2 = 0.5 mole

      Delete
  3. 32 g of o2=44 g of co2
    1 g of o2=44/32 co2
    16 g of o2= 44/32x16 =22g co2 in one mole

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  4. I didn't understand :/

    ReplyDelete
  5. This is bullshit
    This is online confusing site

    ReplyDelete