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In: Chemistry

The enthalpy of sublimation (direct conversion from solid to gas) of carbon dioxide is 26.1 kJ/mol....

The enthalpy of sublimation (direct conversion from solid to gas) of carbon dioxide is 26.1 kJ/mol. What value will the enthalpy of deposition (direct conversion from gas to solid) have? Use 3 significant figures and units of kJ/mol. The enthalpy of sublimation (direct conversion from solid to gas) of carbon dioxide is 26.1 kJ/mol.

How much energy is required to sublimate 8.3 kg of carbon dioxide? Give your answer in kJ. The mass of carbon dioxide that shows up in this problem should have 2 sig figs, assume it does for rounding purposes.

Solutions

Expert Solution

the enthalpy of deposition = reverse of The enthalpy of sublimation

the enthalpy of deposition = - 26.1 kJ / mol

mass of CO2 = 8.3 kg = 8300 g

molar mass of CO2 = 44 g / mol

moles of CO2 = 8300 / 44

                      = 188.6

heat required = ( 26.1 kJ / mol ) x 188.6 mol

                       = 4923 kJ

                   = 4.9 x 10^3 kJ

                                                           

queen_honey_blossom answered 1 year ago
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