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Chemical equilibrium

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Question 16

Dinitrogen tetroxide decomposes into nitrogen dioxide forming the equilibrium mixture below:

N2O4(g)⇌2NO2(g)ΔH=+57.2 kJ mol−1 \text{N}_2\text{O}_4(\text{g}) \rightleftharpoons 2\text{NO}_2(\text{g}) \quad \Delta H = +57.2 \text{ kJ mol}^{-1} N2​O4​(g)⇌2NO2​(g)ΔH=+57.2 kJ mol−1 colorless gasbrown gas \text{colorless gas} \quad\quad\quad\quad\quad \text{brown gas} colorless gasbrown gas

Which statement(s) is/are correct?

  1. The decomposition has a positive entropy change.
  2. When the equilibrium mixture is cooled, the brown color fades.
  3. The oxidation state of nitrogen changes during the reaction.

1, 2 and 3

Only 1 and 2

Only 2 and 3

Only 1

Chemical equilibrium Questions

  1. A Level
  2. /Chemistry
  3. /Chemical equilibrium