What Mass of Ethylene Glycol,when Mixed with 225 G H₂O,will

question 32

Multiple Choice

What mass of ethylene glycol,when mixed with 225 g H₂O,will reduce the equilibrium vapor pressure of H₂O from 1.00 atm to 0.800 atm at 100 °C? The molar masses of water and ethylene glycol are 18.02 g/mol and 62.07 g/mol,respectively.Assume ideal behavior for the solution.

• A) 15.6 g
• B) 49.9 g
• C) 194 g
• D) 969 g
• E) 3.10 × 10³ g

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