(12.8)A substance is initially at 301 K and 1.01 bar (pressure unit). What phase transition occurs when the temperature changesto 201 K at constant pressure?Liquid127Solid1.010.05VaporPressure (bar) (not to scale)49.0O freezingO sublimationO condensationO vaporization279 353Temperature (K)562

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(12.8)A substance is initially at 301 K and 1.01 bar (pressure unit). What phase transition occurs when the temperature changes to 201 K at constant pressure? 49.0 Liquid 167 Solid 1.01 0.05 Vapor Pressure (bar) (not to scale) O freezing O sublimation O condensation O vaporization 279 353 Temperature (K) 562

(12.8)A substance is initially at 301 K and 1.01 bar (pressure unit). What phase transition occurs when the temperature changes to 201 K at constant pressure? 49.0 Liquid 167 Solid 1.01 0.05 Vapor Pressure (bar) (not to scale) O freezing O sublimation O condensation O vaporization 279 353 Temperature (K) 562

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter6: Equilibria In Single-component Systems

Section: Chapter Questions

Problem 6.25E: 6.25. Phosphorus exists as several allotropes that have varying properties. The enthalpy of...

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A 337.2 g sample of acetone gas with a temperature of 56.0°C is converted to a liquid with a temperature of 56.0°C. How much heat is involved? Formula: C3H6OMelting Point: -94.0°CBoiling Point: 56.0°CDensity of liquid: 0.791 g/mLHeat of Fusion: 98.14 J/gHeat of vaporization: 538.9 J/gSpecific heat capacity (solid): 1.653 J/g°CSpecific heat capacity (liquid): 2.161 J/g°CSpecific heat capacity (gas): 1.291 J/g°C
A 791.0 g sample of acetone sitting in the lab has a temperature of 21.7°C. How much heat would be involved in lowering the temperature of the acetone to -200.0°C? Formula: C3H6OMelting Point: -94.0°CBoiling Point: 56.0°CDensity of liquid: 0.791 g/mLHeat of Fusion: 98.14 J/gHeat of vaporization: 538.9 J/gSpecific heat capacity (solid): 1.653 J/g°CSpecific heat capacity (liquid): 2.161 J/g°CSpecific heat capacity (gas): 1.291 J/g°C
Liquid butane (C4H10) is stored in cylinders to be used as afuel. The normal boiling point of butane is listed as -0.5 °C.(a) Suppose the tank is standing in the sun and reaches atemperature of 35 °C. Would you expect the pressure in thetank to be greater or less than atmospheric pressure? Howdoes the pressure within the tank depend on how muchliquid butane is in it? (b) Suppose the valve to the tank isopened and a few liters of butane are allowed to escape rapidly.What do you expect would happen to the temperatureof the remaining liquid butane in the tank? Explain.(c) How much heat must be added to vaporize 250 g ofbutane if its heat of vaporization is 21.3 kJ/mol? What volumedoes this much butane occupy at 755 torr and 35 °C?
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An organic solvent with a molar mass of 56.45 g/mol have a normal boiling point of 45.0 °C and a normal freezing point of -14.0 ºC. If ΔHº of vaporization is 34.4 kJ/mol, ΔHº of fusion is 1.4 kJ/mol, specific heat capacity of the liquid is 2.88 J/mol.ºC ,specific heat capacity of the solid is 0.765 J/mol.ºC and specific heat capacity of the gas is 1.43 J/mol.ºC. Calculate the amount of heat (in kJ) released when 24.0 g of this solvent is converted from liquid at the normal boiling point to solid at the normal freezing point.
A 523.70 g sample of acetone gas has a temperature of 56.0°C. How much heat is involved in converting it to a solid that has a temperature of -94.0°C? Formula: C3H6OMelting Point: -94.0°CBoiling Point: 56.0°CDensity of liquid: 0.791 g/mLHeat of Fusion: 98.14 J/gHeat of vaporization: 538.9 J/gSpecific heat capacity (solid): 1.653 J/g°CSpecific heat capacity (liquid): 2.161 J/g°CSpecific heat capacity (gas): 1.291 J/g°C

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