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Atoms and reactions

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Question 3
82%

Ozone decomposes in the upper atmosphere according to the following equation:

2O3(g)→3O2(g)ΔrH=−288 kJ mol−1 2\text{O}_3(\text{g}) \rightarrow 3\text{O}_2(\text{g}) \quad \Delta_{\text{r}} H = -288\text{ kJ mol}^{-1} 2O3​(g)→3O2​(g)Δr​H=−288 kJ mol−1

At a certain altitude, the molar gas volume is approximately 8.0 m3 mol-1.

What is the energy released, in kJ\text{kJ}kJ, during the decomposition of 12.0 m3 of ozone under these conditions?

A

144144144

B

216216216

C

432432432

D

864864864

Markscheme

Atoms and reactions Questions

  1. A Level
  2. /Chemistry
  3. /Atoms and reactions

199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.

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