A Container Contains a 200 ML of 100% Proof Alcohol

question 69

Multiple Choice

A container contains a 200 mL of 100% proof alcohol (i.e.,it has 50% ethyl alcohol and 50% water by volume) at the boiling point of the alcohol.How long does it take to distill (boil) all the alcohol if heat is supplied at a rate of 100 W? (The density and latent heat of vaporization of ethyl alcohol are 0.81 g/cm³,and 879 kJ/kg.)

• A)712 s
• B)1110 s
• C)450 s
• D)1450 s
• E)950 s

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