4) If the outside temperature in winter is -9 °C, how many grams of ethylene glycol(HO-CH,-CH,-OH) must be added in 1000 g of water so that this solution doesn't freeze inoutside temperature?

Answered: 4) If the outside temperature in winter…

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter13: Solutions And Their Behavior

Section: Chapter Questions

Problem 45PS: An aqueous solution contains 0.180 g of an unknown, nonionic solute in 50.0 g of water. The solution...

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4) If the outside temperature in winter is -9 °C, how many grams of ethylene glycol
(HO-CH,-CH,-OH) must be added in 1000 g of water so that this solution doesn't freeze in
outside temperature?

Expert Solution

Step 1

Freezing point of water = 0 ^◦C or 273.15 K

Freezing point of solution = - 9 ^◦C or (– 9 + 273.15) K

$\begin{array}{rcl} ∆ T_{f} & = & Freezing point of water - freezing point of solution \\ = & 273.15 K - (- 9 + 273.15) K \\ = & 273.15 K - 264.15 K \\ = & 9 K \end{array}$

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