The phase diagram for sulfur is given below (the attached image), along with some information about its phases and transitions. Use this information to answer the questions below: a) Over what range of temperatures and pressures is it possible to have the two solid forms of sulfur exist in equilibrium with each other? [Temperature range in K, pressure range in atm; use the numbers of s.f.’s from the phase diagram] b) What is the boiling temperature of sulfur at a pressure of 2.5 atm? [Start at the normal boiling point and move along the phase boundary. Assume that the enthalpy of the phase transition is constant over the range you’re considering, and that the gas phase is an ideal gas.] [In K, to three s.f.] c) At what pressure will monoclinic solid sulfur have a melting point of 407 K? [Start at the normal melting point and move along the phase boundary. Assume that the enthalpy of the phase transition is constant over the range you’re considering.] [In atm, to three s.f.]
The phase diagram for sulfur is given below (the attached image), along with some information about its phases and transitions. Use this information to answer the questions below: a) Over what range of temperatures and pressures is it possible to have the two solid forms of sulfur exist in equilibrium with each other? [Temperature range in K, pressure range in atm; use the numbers of s.f.’s from the phase diagram] b) What is the boiling temperature of sulfur at a pressure of 2.5 atm? [Start at the normal boiling point and move along the phase boundary. Assume that the enthalpy of the phase transition is constant over the range you’re considering, and that the gas phase is an ideal gas.] [In K, to three s.f.] c) At what pressure will monoclinic solid sulfur have a melting point of 407 K? [Start at the normal melting point and move along the phase boundary. Assume that the enthalpy of the phase transition is constant over the range you’re considering.] [In atm, to three s.f.]
General Chemistry - Standalone book (MindTap Course List)
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Chapter11: States Of Matter; Liquids And Solids
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The phase diagram for sulfur is given below (the attached image), along with some information about its phases and transitions.
Use this information to answer the questions below:
a) Over what range of temperatures and pressures is it possible to have the two solid
forms of sulfur exist in equilibrium with each other? [Temperature range in K, pressure range in
atm; use the numbers of s.f.’s from the phase diagram]
b) What is the boiling temperature of sulfur at a pressure of 2.5 atm? [Start at the
normal boiling point and move along the phase boundary. Assume that the enthalpy of the phase
transition is constant over the range you’re considering, and that the gas phase is an ideal gas.] [In
K, to three s.f.]
c) At what pressure will monoclinic solid sulfur have a melting point of 407 K? [Start
at the normal melting point and move along the phase boundary. Assume that the enthalpy of the
phase transition is constant over the range you’re considering.] [In atm, to three s.f.]
Transcribed Image Text:Liquid
Monoclinic-
153°C,
1420 atm
solid
95.39°C,
1 atm
115.21°C,
1 atm
444.6°C,
1 atm
Rhombic
115.18°C,
3.2 × 10-5 atm
solid
Gas
95.31°C,
5.1 × 10-6 atm
-96
Temperature
• Molar volume of monoclinic solid sulfur: 16.53 cm³ /mol
• Molar volume of liquid sulfur: 17.63 cm³ /mol
• Phase transition enthalpies:
Monoclinic solid to liquid: AH° = 1.85 kJ/mol
Monoclinic solid to gas: AH° = 279 kJ/mol
Liquid to gas: AH° = 277.2 k.J/mol
Pressure, P (atm)
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