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A Sealed Tube Containing an Equilibrium Mixture of NO2(g) (Brown) Δ\Delta

Question 94

Multiple Choice

A sealed tube containing an equilibrium mixture of NO2(g) (brown) and N2O4(g) (colorless) is subjected to a variety of temperatures. For the equilibrium reaction shown, the values of the Δ\Deltarxn and Δ\Deltarxn are also shown. What is observed in the tube with increasing temperature?
2NO2(g) \leftrightarrows N2O4(g) Δ\Delta H °\degree = -58.02 kJ/mol, Δ\Delta S=-176.5 J/mol . K


A) At higher temperatures, the gas in the tube has a darker brown color.
B) At higher temperatures, the gas in the tube has a lighter brown color.
C) At higher temperatures, the gas in the tube is colorless.
D) The color does not change with temperature.
E) At higher temperatures, the gas turns green.

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