Question

Given below are two reactions, involved in the commercial production of dihydrogen (H₂). The two reactions are carried out at temperature “T₁ ” and “T₂ ” respectively
\(C(S)+H_2O(g)\underrightarrow {T_1}\;CO(g)+H_2(g)\)
\(CO(g)+H_2O(g)\underrightarrow{T_2}\;CO_2(g)+H_2(g)\)
The temperature \(T_1\) and \(T_2\) are correctly related as 

• A. \(T_1>T_2\)
• B. \(T_1<T_2\)
• C. T1=T2
• D. T1=100 K, T2=1270 K

Hint:

The water-gas reaction needs very high temperatures. The water-gas shift reac tion, aided by a catalyst, can operate effectively at lower temperatures.

Answer 1

The Correct Option is A

Water-Gas Reaction 

The water-gas reaction requires high temperatures for the reaction to proceed effectively:

Reaction Temperature: \( T_1 \approx 1270 \, \text{K} \)

Water-Gas Shift Reaction

The water-gas shift reaction is typically carried out at lower temperatures in the presence of a catalyst:

Reaction Temperature: \( T_2 \approx 673 \, \text{K} \)

Conclusion:

The temperature for the water-gas reaction (\( T_1 \)) is significantly higher than the temperature for the water-gas shift reaction (\( T_2 \)). Therefore:

\( T_1 > T_2 \)