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Determine volume change for the transformation from Rhombic to monoclinic

Determine volume change for the transformation from Rhombic to monoclinic

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Question

Determine volume change for the transformation from Rhombic to monoclinic

2. Below is the phase diagram of sulphur. At 95.4°C, the densities of rhombic and monoclinic sulphur are 2.07 g cm³ and 1.96 g cm*, whilst the enthalpy change for phase transition from rhombic to monoclinic sulphur is 0.3 kJ mol1. Sulfur 153°C, 1420 atm Liquid 95.4°C 115.21°C 1 atm P Monoclinic 444.6°C 115.2°C, 3.2 x 105 atm Rhombic 95.3°C, 5.1 x 10-6 atm Gas 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 AV 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.
Transcribed Image Text:2. Below is the phase diagram of sulphur. At 95.4°C, the densities of rhombic and monoclinic sulphur are 2.07 g cm³ and 1.96 g cm*, whilst the enthalpy change for phase transition from rhombic to monoclinic sulphur is 0.3 kJ mol1. Sulfur 153°C, 1420 atm Liquid 95.4°C 115.21°C 1 atm P Monoclinic 444.6°C 115.2°C, 3.2 x 105 atm Rhombic 95.3°C, 5.1 x 10-6 atm Gas 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 AV 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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