http://www.chemteam.info/GasLaw/VaporPressureImage.GIF

http://www.chemteam.info/GasLaw/VaporPressureImage.GIF

http://www.chemteam.info/GasLaw/VaporPressureImage.GIF

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http://www.chemteam.info/GasLaw/VaporPressureImage.GIF

Vapor Pressure of Water as a Function of Temperature

0

200

400

600

800

1000

1200

0 20 40 60 80 100 120

Temperature (°C)

Vap

or P

ress

ure

(tor

r)

Vapor Pressure vs Temperature for Water

0

200

400

600

800

1000

1200

1400

1600

0 20 40 60 80 100 120 140

Temperature (°C)

Vap

or

Pre

ssu

re (

mm

Hg

)

RT

Hvap

AeP

CRT

HP vap

ln

CRT

HP vap

ln

Clausius-Clapeyron Plot

ln P = -5154.7(1/T) + 20.46

012345678

0.0023 0.0025 0.0027 0.0029 0.0031 0.0033 0.0035 0.0037 0.0039

1/T (K-1)

ln P

CRT

HP vap

ln

Clausius-Clapeyron Plot

ln P = -5154.7(1/T) + 20.46

012345678

0.0023 0.0025 0.0027 0.0029 0.0031 0.0033 0.0035 0.0037 0.0039

1/T (K-1)

ln P

7.5154R

H vap

CRT

HP vap

ln

Clausius-Clapeyron Plot

ln P = -5154.7(1/T) + 20.46

012345678

0.0023 0.0025 0.0027 0.0029 0.0031 0.0033 0.0035 0.0037 0.0039

1/T (K-1)

ln P

RHR

H

vap

vap

7.5154

7.5154

CRT

HP vap

ln

Clausius-Clapeyron Plot

ln P = -5154.7(1/T) + 20.46

012345678

0.0023 0.0025 0.0027 0.0029 0.0031 0.0033 0.0035 0.0037 0.0039

1/T (K-1)

ln P

314.87.5154

7.5154

7.5154

vap

vap

vap

H

RHR

H

CRT

HP vap

ln

Clausius-Clapeyron Plot

ln P = -5154.7(1/T) + 20.46

012345678

0.0023 0.0025 0.0027 0.0029 0.0031 0.0033 0.0035 0.0037 0.0039

1/T (K-1)

ln P

186.42

314.87.5154

7.5154

7.5154

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H

RHR

H

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vap

vap

vap

212

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P

P vap

CRT

HP vap

ln

The melting point of potassium is 63.2 °C. Molten potassium has a vapor pressureof 10.00 torr at 443 °C and a vapor pressure of 400.0 torr at 708 °C.

(a) Calculate the heat of vaporization of liquid potassium.

(b) Calculate the normal boiling point of potassium.

handouts

Vapor Pressure and Phase Diagrams

Vapor Pressure and Phase Diagrams

Vapor Pressure and Phase Diagrams

Vapor Pressure vs Temperature for Water

0

200

400

600

800

1000

1200

1400

1600

0 20 40 60 80 100 120 140

Temperature (°C)

Vap

or

Pre

ssu

re (

mm

Hg

)

Vapor Pressure and Phase Diagrams

CRT

HP vap

ln

Clausius-Clapeyron Plot

ln P = -5154.7(1/T) + 20.46

012345678

0.0023 0.0025 0.0027 0.0029 0.0031 0.0033 0.0035 0.0037 0.0039

1/T (K-1)

ln P

Vapor Pressure and Phase Diagrams

The melting point of potassium is 63.2 °C. Molten potassium has a vapor pressureof 10.00 torr at 443 °C and a vapor pressure of 400.0 torr at 708 °C.

(a) Calculate the heat of vaporization of liquid potassium.

(b) Calculate the normal boiling point of potassium.

Vapor Pressure and Phase Diagrams

Vapor Pressure and Phase Diagrams

Vapor Pressure and Phase Diagrams