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MDCAT Past Papers - UHS - Chemistry - Chap No 5 - 2014 Quiz

Attempt 10 MCQs on MDCAT Past Papers - UHS - Chemistry - Chap No 5 (Year 2014) | Quiz 1

1. 2H₂O → ΔH = +285.5 kJ/mol What will be the enthalpy change in the equation?

285.5 kJ/mol
Zero kJ/mol
–285.5 kJ/mol
1 kJ/mol

2. Combustion of graphite to form CO₂ can be done by two ways. Reactions are: C + O₂ → CO₂ ΔH = –284 kJ/mol C + ½O₂ → CO ΔH = –110 kJ/mol CO + ½O₂ → CO₂ ΔH = –676 kJ/mol What will be enthalpy of formation of CO?

–110 kJ/mol
–110 kJ/mol
110 kJ/mol
676 kJ/mol

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