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C. Questions and Problems. Answer the following. 1. Why does one feel colder coming from a swimming pool into windy air than into still air at the same temperature? .

C. Questions and Problems. Answer the following. 1. Why does one feel colder coming from a swimming pool into windy air than into still air at the same temperature? .

Chemistry
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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C. Questions and Problems. Answer the following. 1. Why does one feel colder coming from a swimming pool into windy air than into still air at the same temperature?. 2. Assuming all substances are at room temperature, choose the liquid having a vapor pressure between higher a. mercury and water b. condensed milk and evaporated milk c. acetone and honey d. motor oil and gasoline 3. Which substance in each pair has greater intermolecular forces of attraction? a. Gas A, vapor pressure is 400 torr at room temperature; Gas B, vapor pressure is 700 torr at room temperature b. Gas C, critical temperature is 70°C; Gas D, critical temperature is 120°C c. Substance E, solid at room temperature; Substance F, liquid at room temperature d. Liquid G, boiling point is 50°C; Liquid H, boiling point is 85°C e. Solid I, melts at -9°C; Solid J, melts at -36°C 4. Compare the solid, liquid, and gaseous states of water with respect to the following: Solid Liquid Gas a. Rate of diffusion b. Distance between molecules C. Compressibility d. Density e. Energy of molecules 5. Explain why molecular solids have lower melting points than ionic solids. 6. Calculate the energy required to change 30 g of ice at -27°C to steam at 130°C.
Transcribed Image Text:C. Questions and Problems. Answer the following. 1. Why does one feel colder coming from a swimming pool into windy air than into still air at the same temperature?. 2. Assuming all substances are at room temperature, choose the liquid having a vapor pressure between higher a. mercury and water b. condensed milk and evaporated milk c. acetone and honey d. motor oil and gasoline 3. Which substance in each pair has greater intermolecular forces of attraction? a. Gas A, vapor pressure is 400 torr at room temperature; Gas B, vapor pressure is 700 torr at room temperature b. Gas C, critical temperature is 70°C; Gas D, critical temperature is 120°C c. Substance E, solid at room temperature; Substance F, liquid at room temperature d. Liquid G, boiling point is 50°C; Liquid H, boiling point is 85°C e. Solid I, melts at -9°C; Solid J, melts at -36°C 4. Compare the solid, liquid, and gaseous states of water with respect to the following: Solid Liquid Gas a. Rate of diffusion b. Distance between molecules C. Compressibility d. Density e. Energy of molecules 5. Explain why molecular solids have lower melting points than ionic solids. 6. Calculate the energy required to change 30 g of ice at -27°C to steam at 130°C.
EXERCISE 1.1 lam Answer the following thoroughly. 1. Which substance in each pair has the higher boiling point? Explain. LESS a. I, and Cl, b. LiCl and HCI c. H,O and H,S dalonon Iniog 2. Consider the kinds of intermolecular forces present in hydrogen gas (H,), water (H,O), silane (SiH,), and phosphine (PH,). Arrange the substances in the order of increasing boiling point. to ho o
Transcribed Image Text:EXERCISE 1.1 lam Answer the following thoroughly. 1. Which substance in each pair has the higher boiling point? Explain. LESS a. I, and Cl, b. LiCl and HCI c. H,O and H,S dalonon Iniog 2. Consider the kinds of intermolecular forces present in hydrogen gas (H,), water (H,O), silane (SiH,), and phosphine (PH,). Arrange the substances in the order of increasing boiling point. to ho o
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