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Find the enthalpy of sublimation of 100g of CO2 at 183 K if ?Hsub = 3.87 kcal/mol.

Find the enthalpy of sublimation of 100g of CO2 at 183 K if ?Hsub = 3.87 kcal/mol.

Grade:12

1 Answers

Pankaj
askIITians Faculty 131 Points
7 years ago
It seems as you want to know about heat required for the sublimation of 100 g of CO2:

Enthalpy so sublimation is the amount of heat required for sublimation of 1 mole of the substance.
So,
dH = 3.87 Kcal/mol
Number of moles of CO2 = 100g/Molar mass of CO2 = 100/44 = 2.27 mole
Heat required for sublimation = (3.87 )(2.27) =8.8 kcal.mol

Thanks and Regards
Pankaj Singh
askIITians Faculty

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