SSC JE Mechanical Engineering 2013 Paper

Question : 153 of 200

Marks: +1, -0

For complete burning of 1 kg of carbon, the air required will be about

Solution:

Using stoichiometric equation

C + O_2 → CO_2

For 1 kg C we need

= 32/12= 2.67

kg of oxygen and for 2.67 kg oxygen
⇒

2.67 ×100/23

kg of air = 11.6 kg of air
As 23% by weight of air is oxygen.

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