Which of the Following Reactions Absorbs Heat from the Surroundings

question 15

Multiple Choice

Which of the following reactions absorbs heat from the surroundings in order to proceed to completion?
I. CO (g) + ¹/₂ O₂ (g) →CO₂ (g) D H _rxn = - 283.0 kJ
II. Al₂O₃ (s) →2 Al (s) + ³/₂ O₂ (g) (endothermic)
III. SO₃ (g) + 99.2 kJ→S (s) + ³/₂ O₂ (g)

• A) I only
• B) I and III
• C) I and II
• D) II and III
• E) All of these

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