Apentix/AP Chemistry/Unit 3: Intermolecular Forces and Properties/Question
AP Chemistryhardmcq1 pt

The boiling point of a 1 molal solution of a nonvolatile nonelectrolyte is elevated by 0.512 C compared to pure water. If the Kb of water is 0.512 C/m, what would be the boiling point of a 2 molal solution?

A.100 C
B.100.512 C
C.102.048 C
D.101.024 C

Explanation

Core Concept

Delta Tb = Kb times m = 0.512 times 2 = 1.024 C. New boiling point = 100 + 1.024 = 101.024 C. Boiling point elevation is directly proportional to molality.

Correct Answer

D101.024 C

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