The dissociation of N2O4(g) is important in photochemical air pollution, like that common in Los Angeles, California. The reaction can be written N2O4(?) ⇆ 2NO2(?) Will the fraction of molecules dissociated increase or decrease when the temperature is raised to 555 K? Assume that ΔrH is independent of temperature.

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The dissociation of N2O4(g) is important in photochemical air pollution, like that common in Los Angeles, California. The reaction can be written

N2O4(?) ⇆ 2NO2(?)

Will the fraction of molecules dissociated increase or decrease when the temperature is raised to 555 K? Assume that ΔrH is independent of temperature.

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Ionic compounds dissociate in ions. In an aqueous state ionic compounds separate in equilibrium. The dissociation constant is an equilibrium constant when ions separate (dissociate) reversibly into smaller components. If dissolution is an exothermic reaction, the dissociation constant will increase with rising temperature. 

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