Consider a binary mixture of ethanol, EtOH (CH3CH2OH) and water (H2O) . A plot of the partial molar volumes of EtOH and H2O versus mole fraction EtOH (xEtOH) is provided in the following fi gure. Note that the units of partial molar volume are on a per mass basis so that both plots fi t on the same scale. Answer the following questions:

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cm V: 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.0 VH0 0.2 0.4 XEtOH 0.6 VETOH 0.8 1.0