Chemistry - Thermochemistry Question with Solution | TestHub
ChemistryThermochemistryEnthalpy of CombustionHard2 minQB
ChemistryHardsingle choice
A quantity of 0.6 g of carbon was converted into CO2 producing 4800 cal of heat. When the same quantity of carbon was converted to CO, 2600 cal of heat were produced. What will be the heat produced when 2.4 g of carbon is burnt completely to give CO and CO2 in the mole ratio 1:1?
Options:
Answer:
D
Solution:
0.6 g C = 0.05 mol. Per mole of C: to CO2 = 4800/0.05 = 96000 cal; to CO = 2600/0.05 = 52000 cal. 2.4 g C = 0.20 mol; half goes to CO (0.10 mol) and half to CO2 (0.10 mol). Heat = 0.10 × 52000 + 0.10 × 96000 = 5200 + 9600 = 14800 cal. This is option (d).
Stream:JEESubject:ChemistryTopic:ThermochemistrySubtopic:Enthalpy of Combustion
⏱ 2mℹ️ Source: QB
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