Chemistry - Thermochemistry Question with Solution | TestHub
ChemistryThermochemistryEnthalpy of ReactionMedium2 minQB
ChemistryMediumsingle choice
2H2O2(aq) → 2H2O(l) + O2(g)
The above decomposition is exothermic, so the actual temperature of the insulated reaction vessel may differ from that expected. If the initial temperature of the vessel is used in the calculations, how would this affect the predicted value of moles of O2 (n), from n = PV/RT?
Options:
Answer:
C
Solution:
The exothermic reaction heats the insulated vessel, so the actual T is higher than the initial T used in n = PV/RT. Using a temperature that is too low in the denominator gives an n that is too large, so the predicted value is greater than the actual value. This is option (c).
Stream:JEESubject:ChemistryTopic:ThermochemistrySubtopic:Enthalpy of Reaction
⏱ 2mℹ️ Source: QB
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