SO3 is not absorbed in water directly because__________________?
Correct answer: A. Reaction is exothermic
- A. Reaction is exothermic
- B. It is insoluble in water
- C. Dilute acid is produced
- D. All of above
Explanation
Sulphur trioxide reacts with water very vigorously and exothermically, producing a fine mist of sulphuric acid that is difficult to condense and absorb safely. Industrially, SO3 is absorbed in concentrated H2SO4 to form oleum, which is then diluted. The likely trap is insoluble in water, but SO3 is highly reactive with water rather than insoluble.
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About Exothermic and Endothermic Reactions
Exothermic reactions release heat to the surroundings and have negative enthalpy change, while endothermic reactions absorb heat and have positive enthalpy change. The topic uses energy profiles to identify reactants, products and activation energy, and includes bond energy, enthalpy diagrams, calorimetry and Hess's law for calculating overall heat changes.
Practise Thermochemistry and Energetics of Chemical Reactions
728 free Thermochemistry and Energetics of Chemical Reactions MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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