Question

1 kg of wood contains 15% moisture and 7% hydrogen by weight. How much water is evaporated during complete combustion of 1 kg of wood

Answer 1

Answer:15% of water

Answer 2

Now there are two sources of water generation in this combustion process.

1) Trapped moisture in the wood.

2) Trapped hydrogen in the wood which will react with the atmospheric oxygen and form water.

Now,the total amount of trapped moisture is = (1000 × 15/100)g = 150 g.

And the total amount of hydrogen generated water is = ( 1000× 3.5/100) = 35 g. (Because, in a single molecule of water there are two atoms of hydrogen,so total amount of hydrogen will be in it's half amount of water)

Total amount of evaporated water;

= (150+35) g = 185 g.