Determine the Freezing Point Depression of a Solution That Contains

question 55

Multiple Choice

Determine the freezing point depression of a solution that contains 30.7 g glycerin (C₃H₈O₃, molar mass = 92.09 g mol^-1) in 376 mL of water. Some possibly useful constants for water are K_f = 1.86 °C m^-1 and K_b = 0.512 °C m^-1.

• A) 0.887 °C
• B) 1.65 °C
• C) 2.54 °C
• D) 3.33 °C
• E) 0.654 °C

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Definitions:

Set-Point

The theory that each individual has a genetically determined range of weight and temperature that their body will try to maintain to stay at optimal health.

Metabolism

The complex set of chemical reactions within a living organism that are necessary for the maintenance of life, involving energy production and utilization.

Food Restriction

The practice of limiting the amount and/or type of food ingested, often used for weight control or medical reasons.

Obesity

A medical condition involving excess body fat that increases the risk of health problems.