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ICSE Class 9 Chemistry Question 3 of 26

Study of the First Element — Hydrogen — Question 10

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10
Question

Question 10

State the conditions and give balanced equations for the conversion of –

(a) coke to water gas,

(b) water gas to hydrogen

in the Bosch process.

Answer

(a) coke to water gas

Ccoke+H2Osteam→1000°C[CO+H2]water gas−Δ\underset{\text{coke}}{\text{C}} + \underset{\text{steam}}{\text{H}_2\text{O}} \xrightarrow{1000 \degree \text{C}} \underset{\text{water gas}}{[\text{CO} + \text{H}_2 ]} - \Delta

(b) water gas to hydrogen

[CO+H2]water gas+H2Oexcess steam→450°CFe2O3 CO2+2H2+Δ\underset{\text{water gas}}{[\text{CO} + \text{H}_2 ]} + \underset{\text{excess steam}}{\text{H}_2\text{O}} \underset{\text{Fe}_2\text{O}_3} {\xrightarrow{450 \degree \text{C}}} \text{ CO}_2 + 2\text{H}_2 + \Delta