For most substances, the solid is more dense than the liquid. Sketch the phase diagram for such a substance, being sure to have the solid-liquid equilibrium line slope in the correct direction. Use Le Châtelier's principle to explain why the melting point of such a substance should increase with pressure. Select all that apply. O An decrease in pressure should favor the system with the lower volume, i.e. the solid. O If melting were to be accomplished at the lower pressure, it would require a temperature that is higher than the normal melting temperature. O An increase in pressure should favor the system with the lower volume, i.e. the solid. O If melting were to be accomplished at the higher pressure, it would require a temperature that is higher than the normal melting temperature. O If the substance is at its melting point at a pressure of one atmosphere, and then if the pressure were to be decreased, more solid would form at the expense of liquid - that is, more of the substance would freeze. O If the substance is at its melting point at a pressure of one atmosphere, and then if the pressure were to be increased, more solid would form at the expense of liquid - that is, more of the substance would freeze.

For most substances, the solid is more dense than the liquid. Sketch the phase diagram for such a substance, being sure to have the solid-liquid equilibrium line slope in the correct direction. Use Le Châtelier's principle to explain why the melting point of such a substance should increase with pressure. Select all that apply. O An decrease in pressure should favor the system with the lower volume, i.e. the solid. O If melting were to be accomplished at the lower pressure, it would require a temperature that is higher than the normal melting temperature. O An increase in pressure should favor the system with the lower volume, i.e. the solid. O If melting were to be accomplished at the higher pressure, it would require a temperature that is higher than the normal melting temperature. O If the substance is at its melting point at a pressure of one atmosphere, and then if the pressure were to be decreased, more solid would form at the expense of liquid - that is, more of the substance would freeze. O If the substance is at its melting point at a pressure of one atmosphere, and then if the pressure were to be increased, more solid would form at the expense of liquid - that is, more of the substance would freeze.

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...

See similar textbooks

Similar questions

Molecular Solid: A solid material primarily held in this phase by intermolecular forces causing attraction between the molecules. True False
Find the FALSE statement regarding the phase diagram shown below. F D. Y X E 1.0 A Temperature (*C) Pressure (atm)
Write True if the statement is true; otherwise, write False. 1. The intermolecular forces on the liquid particles at the surface are balance 2. The weaker the intermolecular forces present. the lower the boiling point of a liquid. 3. The partial pressure of a liquid at which the rates of evaporation and condensation are equal is called the vapor pressure of the liquid. 4. The boiling point af water in Baguio city is higher than 100C. 5. The stronger the attraction between the liquid particles, the greater the viscosity of the liquid is. 6. The molar heat of vaporization of a substance is the amount of heat absorbed by the substance during a phase change from liquid to solid. 7. As a substance undergoes a phase change, the temperature remains constant. 8. The conversion from liquid to gas at the boiling point of the liquid is called evaporation. 9. The normal boiling point of a liquid is the boiling point of the liquid when external pressure is equal to 1 atm. 10. Liquid drops…
The pressure above a pure sample of solid Substance X at -120. °C is lowered. At what pressure will the sample melt? Use the phase diagram of X below to find your answer. pressure (atm) solid liquid gas temperature (K) Note: your answer must be within 2.25 atm of the exact answer to be graded correct.
7. The vapor pressure of isooctane is 75.0 torr at 34.0 °C. What is the normal boiling point Given: Heat of vaporization of isooctane = 33.8 kJ/mol
A type of alloy is a homogeneous solid mixture of metals and melts at a distinct temperature. What is this type of alloy? Give a detailed explanation of this type of alloy with a suitable example and related phase diagram.
Use the following vapor pressure data to answer the questions: Liquid Ag Ni Vapor Pressure, torr Temperature, °C 10 1540 10 2090 (1) In which liquid are the attractive forces the weakest ? (2) Which liquid would be expected to have the highest heat of vaporization?
The pressure above a pure sample of solid Substance X at -146. °C is lowered. At what pressure will the sample sublime? Use the phase diagram of X below to find your answer. pressure (atm) solid 200 liquid temperature (K) 400 gas Note: your answer must be within 0.5 atm of the exact answer to be graded correct.
None
O ADVANCED MATERIAL Using a phase diagram to predict phase at a given temperature... Study t. lowing phase diagram of Substance X. 0.4 solid liquid 0.2 gas 0. 200 400 temperature (K) Use this diagram to answer the following questions. Suppose a small sample of pure X is held at 166. °C and 0.2 atm. What will be the state of the sample? (choose one) 8 Suppose the temperature is held constant at 166. °C but the pressure is decreased by 0.1 atm. what will happen to the sample? (choose one) Suppose, on the other hand, the pressure is held constant at 0.2 atm but the temperature is decreased by 144. °C. What will happen to the v (choose one) sample? Nothing. It will melt. It will freeze. Explanation Check It will boil. It will condense. 20 80 F2 F3 F4 F5 pressure (atm) II
A can be used to determine the vapor pressure, p* of a pure substance at certain temperatures. T-x diagram phase diagram O P-x diagram Сох chart
In the phase diagram of carbon dioxide, the slope of the solid-liquid boundary is positive, thus the melting point decreases as pressure increases. True False