Chemistry - Thermochemistry Question with Solution | TestHub
A factory is producing methanol based on the reaction:
CO + 2H2 → CH3OH; ΔH = -100 R
Hydrogen and carbon monoxide are obtained by the reaction:
CH4 + H2O → CO + 3H2
Three units of factory, namely, reformer (for the production of H2 and CO), reactor (for the production of methanol from CO and H2) and separator (to separate CH3OH from CO and H2) are schematically shown in the figure:
The flow of methanol from Valve-3 is 1000 mol/sec. The factory is so designed that 2/3 of the CO is converted to CH3OH. Assume that the reformer reaction goes to completion.
Amount of energy released in methanol reactor in one minute is
Options:
Answer:
Solution:
The amount of methanol formed in 1 minute is calculated as 1000 × 60 = 6.0 × 104 mol.
The heat per mole is given as 100R. Using the value R = 2 cal/K-mol, we get:
100 × 2 cal = 200 cal = 0.2 kcal
Therefore, the total energy is 6.0 × 104 × 0.2 = 12,000 kcal. This corresponds to option (a).
