4You are given the phase diagram shown andasked to determine several properties of thesubstance. First, find the normal melting pointand boiling point.Pressurein atm1.00-0.75-0.50-0.25-0-50solid-25liquid-B-gas025Temperature, °CD50EThis data does not extend to high enough pres-sure to determine the normal melting and boilingpoints of this substance.The normal melting point is ~-10 degrees Cel-sius, and the normal boiling point -50 degreesCelsius.This substance has a triple point so the normalmelting and boiling points are the same.

Answered: You are given the phase diagram shown…

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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4
You are given the phase diagram shown and
asked to determine several properties of the
substance. First, find the normal melting point
and boiling point.
Pressure
in atm
1.00-
0.75-
0.50-
0.25-
0
-50
solid
-25
liquid
-B-
gas
0
25
Temperature, °C
D
50
E
This data does not extend to high enough pres-
sure to determine the normal melting and boiling
points of this substance.
The normal melting point is ~-10 degrees Cel-
sius, and the normal boiling point -50 degrees
Celsius.
This substance has a triple point so the normal
melting and boiling points are the same.

Expert Solution

Step 1

Boiling point- The temperature at which vapour pressure of liquid become equal to atmospheric pressure (1 atm) is called boiling point of liquid.

Similarly for melting point

Melting point- The temperature at which pressure of solid become equal to atmospheric pressure (1 atm) is called melting point of solid.

In order to determine the melting and boiling point from the phase diagram, the temperature where binary phase lines meats at 1 atm pressure called melting and boiling point.

In present graph the phase lines are not extended up to atmospheric pressure (1 atm), hence normal melting and boiling point of substance can not be determined from given phase diagram.

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