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Energetics

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Question 6

Which equation represents the chemical reaction for which the enthalpy change is equal to the standard enthalpy of combustion of methanol?

A

CH3OH(l)+32O2(g)→CO2(g)+2H2O(g)\text{CH}_3\text{OH(l)} + \frac{3}{2}\text{O}_2\text{(g)} \rightarrow \text{CO}_2\text{(g)} + 2\text{H}_2\text{O(g)}CH3​OH(l)+23​O2​(g)→CO2​(g)+2H2​O(g)

B

CH3OH(l)+32O2(g)→CO2(g)+2H2O(l)\text{CH}_3\text{OH(l)} + \frac{3}{2}\text{O}_2\text{(g)} \rightarrow \text{CO}_2\text{(g)} + 2\text{H}_2\text{O(l)}CH3​OH(l)+23​O2​(g)→CO2​(g)+2H2​O(l)

C

2CH3OH(l)+3O2(g)→2CO2(g)+4H2O(l)2\text{CH}_3\text{OH(l)} + 3\text{O}_2\text{(g)} \rightarrow 2\text{CO}_2\text{(g)} + 4\text{H}_2\text{O(l)}2CH3​OH(l)+3O2​(g)→2CO2​(g)+4H2​O(l)

D

CH3OH(g)+32O2(g)→CO2(g)+2H2O(l)\text{CH}_3\text{OH(g)} + \frac{3}{2}\text{O}_2\text{(g)} \rightarrow \text{CO}_2\text{(g)} + 2\text{H}_2\text{O(l)}CH3​OH(g)+23​O2​(g)→CO2​(g)+2H2​O(l)

Markscheme

Energetics Questions

  1. A Level
  2. /Chemistry
  3. /Energetics

34 exam-style questions on AQA A Level Chemistry Energetics, covering Enthalpy change, Calorimetry, Applications of Hess's law, and Bond enthalpies. Each one has a worked solution and a mark scheme showing where the marks go.

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