The Reaction of Chlorine and Water Vapor Was Allowed to Reach

question 193

Multiple Choice

The reaction of chlorine and water vapor was allowed to reach equilibrium at 25 C:
2 Cl₂ (g) + 2 H₂ O (g) 4 HCl (g) + O₂(g)
The volume of the reactor increased so that the pressure in the reaction chamber at equilibrium decreased from 5 atm to 1 atm. Choose the correct statement below.

• A) The number of moles of Cl₂ increase.
• B) The number of moles of HCl decrease.
• C) The number of moles of H₂O increase.
• D) The number of moles of O₂ increase.
• E) The number of moles of all substances remain unchanged.

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