is the phase diagram of sulphur. At 95.4˚C, the densities of rhombic and monoclinic sulphur are 2.07 g cm-3 and 1.96 g cm-3 , whilst the enthalpy change for the phase transition from rhombic to monoclinic sulphur is 0.3 kJ mol-1 . i) How many triple points are there? ii) What is the most stable form of sulphur under normal conditions? iii) Describe what happens when sulphur at 1 atm is heated from 80˚C to 200˚C.
is the phase diagram of sulphur. At 95.4˚C, the densities of rhombic and monoclinic sulphur are 2.07 g cm-3 and 1.96 g cm-3 , whilst the enthalpy change for the phase transition from rhombic to monoclinic sulphur is 0.3 kJ mol-1 . i) How many triple points are there? ii) What is the most stable form of sulphur under normal conditions? iii) Describe what happens when sulphur at 1 atm is heated from 80˚C to 200˚C.
Chemistry
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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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is the phase diagram of sulphur. At 95.4˚C, the densities of rhombic and
monoclinic sulphur are 2.07 g cm-3
and 1.96 g cm-3
, whilst the enthalpy change for the
phase transition from rhombic to monoclinic sulphur is 0.3 kJ mol-1
.
i) How many triple points are there?
ii) What is the most stable form of sulphur under normal conditions?
iii) Describe what happens when sulphur at 1 atm is heated from 80˚C to 200˚C.
iv) Determine the volume change ΔV for the transformation from rhombic to
monoclinic sulphur.
v) Estimate the pressure at which rhombic and monoclinic sulphur coexist in
equilibrium at a temperature of 373 K.
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