### Boiling Point Question**Question:**Which of the following pure substances has the highest normal boiling point?1. ○ H₂O2. ○ CF₄3. ○ CsF4. ○ CaF₂5. ○ KF**Explanation:**This question asks students to identify which of the given pure substances has the highest boiling point under normal conditions. The boiling point is the temperature at which a substance transitions from a liquid to a gas. Factors influencing boiling points include molecular weight, type of bonding (e.g., ionic, covalent), and intermolecular forces (e.g., hydrogen bonding, Van der Waals forces).

Normal Boiling point is the temperature at which vapour pressure of a substance becomes equal to the atmospheric pressure. Substance which is having less intermolecular forces have more volatile nature and boiling point is less. H2O and CF4 are the covalent compound while CsF, KF and CaF2 are ionic compounds. Since intermolecular forces are weak in molecular solids than ionic solids so H2O and CF4 has lower boiling point. Among ionic solids CsF, KF and CaF2 the highest boiling point is for CaF2 due to highest lattice energy. Since lattice energy depends on the charge on the ions and highest charge is on Calcium ion (Ca+2). So highest boiling point is for CaF2.

Answered: Which of the following pure substances…

Science

Chemistry

Which of the following pure substances has the highest normal boiling point? O H2O O CF4 O CsF O CaF₂ O KF

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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