Chemistry-
General
Easy
Question
The heat evolved in combustion if 112 litres of water gas (mixture of equal volume of H2(g) and CO(g) is
H2(g) + 1/2 O2(g) = H2O(g) 
H = –241.8 kJ
CO(g) + 1/2 O2(g) = CO2(g) H = –283 kJ
- 241.8 kJ
- 296.5 kJ
- 1312 kJ
- 1586 kJ
The correct answer is: 1312 kJ
On adding equation (1) and (2), we get
H2 + CO + O2 ¾® H2O + CO2 + DH = – 524.8 kJ
2 ´ 22.4 litre (H2 + CO) evolve 524.8 kJ heat
\112 litre water gas evolved = ´ 112
= 1312 kJ
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