How many kilojoules of heat are required to vaporize 50.0 g of ethanol, $C_{2} H_{6} O$ $C_2H_6O$ ? The boiling point of ethanol is 78.3°C. Its molar heat of vaporization is 38.6 kJ/mol.

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Answer 1 · 2017-05-11T06:44:20

We want the enthalpy associated with the reaction.........

$"H"_3"CCH"_2"OH"(l) +Delta rarr "H"_3"CCH"_2"OH"(g)$

You have a mass of $50.0*g$ $"EtOH"$ , that is assumed to be at $78.3$ $""^@C$ , and the enthalpy of vaporization is calculated by the product:

$DeltaH_"vaporization"^@=(50.0*g)/(46.07*g*mol^-1)xx38.6*kJ*mol^-1=$

$=??*kJ$ .

How many kilojoules of heat are required to vaporize 50.0 g of ethanol, C_2H_6OC2H6OC_2H_6O? The boiling point of ethanol is 78.3°C. Its molar heat of vaporization is 38.6 kJ/mol.