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Chapter 11 Quiz D: Physical Chemistry Concepts, Quizzes of Chemistry
A quiz on various topics related to physical chemistry, including the distinction between boiling point and normal boiling point, intermolecular and intramolecular forces in liquid water, definition of meniscus and its behavior in a graduated cylinder, calculation of the amount of ice required to cool water, comparison of normal boiling points of nh3 and ch4, and the creation of a phase diagram for a substance.
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Chapter 11 Quiz D Name ________Key__________________ 1pt 1. Distinguish between boiling point and normal boiling point. 1pt 2. Identify the intermolecular and intramolecular forces of attraction in liquid water. 2pts 3. Define meniscus. Then using the terms cohesive and adhesive, explain the meniscus of water in a glass graduated cylinder. 2pts 4. What quantity of ice at 0.0oC must be added to 75.0 g of water at 35.0oC to give water at 0.0oC? Specific heat of ice 2.1 J/gxoC DHvap = 40.7 kJ/mol Specific heat of liquid water 4.2 J/gxoC DHfus = 6.02 kJ/mol Specific heat of steam 2.0 J/gxoC 2pts 5. Which pure substance has the higher normal boiling point, NH 3 or CH 4? Explain your answer in terms of molar mass and intermolecular forces of attraction. 2pts 6. The triple point of a substance is .80 atm and 25oC. The normal boiling and melting points are 115 oC and 35 oC respectively. Draw the phase diagram and label the regions where the gas, liquid and solid states are stable.