In a flask, colourless `N_(2)O_(4)` is in equilibrium with brown-coloured `NO_(2)`. At equilibrium, when the flask is heated to `100^(@)C` the brown colour deepens and on cooling, the brown colour became less coloured. The change in enthalpy `DeltaH` for the ayatem isA. NegativeB. PositiveC. ZeroD. Undefined

In a flask, colourless `N_(2)O_(4)` is in equilibrium with brown-colou

1.	In a flask, colourless `N_(2)O_(4)` is in equilibrium with brown-coloured `NO_(2)`. At equilibrium, when the flask is heated to `100^(@)C` the brown colour deepens and on cooling, the brown colour became less coloured. The change in enthalpy `DeltaH` for the ayatem isA. NegativeB. PositiveC. ZeroD. Undefined
Answer» Correct Answer - B The reaction is endothermic, so on getting energy, forward reaction is favoured producing more `NO_(2)`. This causes colour to deepen.

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