Ch.11 - Liquids, Solids & Intermolecular ForcesWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: A phase diagram is a pressure-temperature graph that shows the ranges of temperature and pressure over which each phase is stable. The phase diagram is divided into three regions, each region represe

Problem

A phase diagram is a pressure-temperature graph that shows the ranges of temperature and pressure over which each phase is stable.

The phase diagram is divided into three regions, each region representing one stable phase: solid, liquid, or gas. There are three boundary lines that separate the phases from one another. These boundary lines represent the equilibrium between two phases. The point at which the three boundary lines intersect is called the triple point. All three phases can exist in equilibrium with each other at this point.

Use the phase diagram for CO 2 and determine which of the following statements are correct.

SELECT ALL THAT APPLY.

  • All three phases of CO2 exist simultaneously at the triple point.
  • When the pressure is 1 atm, there is no temperature at which the liquid phase of CO  2 exists.
  • CO2 forms a supercritical fluid at temperatures less than 31 degrees Celsius.
  • CO2 is a gas under normal conditions of temperature and pressure.
  • Movement across boundary line BO corresponds to a phase change.
  • When the pressure is 4 atm and the temperature is more than -56.7 degrees Celsius, CO  2 exists as a solid.