Chemistry - Thermochemistry Question with Solution | TestHub
ChemistryThermochemistryEnthalpy of CombustionMedium2 minQB
ChemistryMediumsingle choice
Passage / Comprehension
When 24 g of carbon reacted with oxygen to form CO and CO2 at 298 K and constant pressure, 133.6 kcal of heat was liberated and no carbon remained. Heat of formation of CO and CO2 are -26.0 and -94.0 kcal/mole, respectively.
Mass of oxygen reacted with carbon is
Options:
Answer:
D
Solution:
CO 0.8 mol needs 0.4 mol O2; CO2 1.2 mol needs 1.2 mol O2. Total 1.6 mol = 1.6×32 = 51.2 g. This is option (d).
Stream:JEESubject:ChemistryTopic:ThermochemistrySubtopic:Enthalpy of Combustion
⏱ 2mℹ️ Source: QB
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