A Container Contains a 200 ML of 100% Proof Alcohol $\circ$

question 9

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 20 ^$\circ$ C.How much heat is needed to bring the mixture to the boiling point of the alcohol? (assume that the specific heat in the 100% proof can be treated as due to the alcohol and water separately,and the density,boiling point and specific heat of alcohol are 0.81 g/cm³,78 ^$\circ$ C,and 2.4 J/(g.C ^$\circ$ ) ,respectively)

• A)32650 J
• B)35525 J
• C)11136 J
• D)17400 J
• E)48557 J

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