Question

Ethylene glycol (c2h4o2) is used as an antifreeze in car radiators . calculate the temperature at which ice will begin to separate from a mixture with 20 mass percent of glycol in the car radiator kf for water 1.86k kg mol-1
and molar mass of ethylene glycol is 62g mol-1

Answer 1

Answer:

7.5 K

Explanation:

W2 =20g of ethylene glycol

W1= weight of water= 100-20=80 g

Tf=Kf x m

Tf= (Kf x W2 x 1000) / (M2 x W1)

  = (1.86 x 20 x 1000) / (62 x 80)

  = 7.5 K

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