Concept explainers
Interpretation:
The changes occurs in molecular arrangement which takes place when the pressure is increased from 8 atm to 16 atm and the temperature remains constant at should be described.
Concept introduction:
When energy or heat is gain or lost by any matter, the matter changes its state to form a
State of matter is classified as:
- Solid
- Liquid
- Gas
A graphical diagram which represents the physical states of a substance under different values of temperature and pressure is known as phase diagram.
The general representation of phase diagram is:
Triple point of a substance is defined as the point at which solid, liquid and gas phase or state of that substance coexist in the equilibrium.
Answer to Problem 12STP
A substance changesfrom gas phase to liquid phase when the pressure is increased from 8 atm to 16 atm and the temperature remains constant at
Explanation of Solution
The given graph is:
Graph can be redrawn as:
From above graph and general graph of phase diagram, at pressure 8 atm and temperature ofthe labeled area (C) represents gas phase.
When the pressure is increased tochange in state occurs.
Graph can be drawn as:
In above graph, one can see that the when the pressure is 16 atm, then by drawing straight line or parallel line to y-axis, substance crosses the line into liquid state.
Thus, when the pressure is increased from 8 atm to 16 atm and the temperature remains constant atthen a substance changes from gas state to liquid state.
Chapter 21 Solutions
Glencoe Chemistry: Matter and Change, Student Edition
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