Chemistry - Thermochemistry Question with Solution | TestHub
ChemistryThermochemistryEnthalpy of ReactionEasy2 minQB
ChemistryEasysingle choice
In a flask, colourless N2O4 is in equilibrium with brown coloured NO2. At equilibrium, when the flask is heated at 373 K, the brown colour deepens and on cooling it becomes less coloured. The change in enthalpy for this reaction is
Options:
Answer:
B
Solution:
Heating deepens the brown color, which indicates that the forward reaction, N₂O₄ → 2NO₂, is favored by a rise in temperature. According to Le Chatelier's principle, a reaction favored by heating is endothermic, meaning that ΔH is positive. This corresponds to option (b).
Stream:JEESubject:ChemistryTopic:ThermochemistrySubtopic:Enthalpy of Reaction
⏱ 2mℹ️ Source: QB
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