Use the observation in the first column to answer the question in the second column. observation question Which has a higher vapor pressure? At 1 atm pressure, Substance C Substance C boils at 145. °C and Substance D Substance D boils at 128. °C. Neither, C and D have the same vapor pressure. It's impossible to know without more information. Which has the higher boiling point? Substance A The enthalpy of vaporization of Substance A is smaller Substance B than that of Substance B. Neither, A and B have the same boiling point. It's impossible to know without more information. Which has a higher boiling point? At 77 °C, substance E has a vapor pressure of 145. torr and Substance F Substance E Substance F has a vapor pressure of 115. torr. Neither, E and F have the same boiling point. It's impossible to know without more information. O O O O
Use the observation in the first column to answer the question in the second column. observation question Which has a higher vapor pressure? At 1 atm pressure, Substance C Substance C boils at 145. °C and Substance D Substance D boils at 128. °C. Neither, C and D have the same vapor pressure. It's impossible to know without more information. Which has the higher boiling point? Substance A The enthalpy of vaporization of Substance A is smaller Substance B than that of Substance B. Neither, A and B have the same boiling point. It's impossible to know without more information. Which has a higher boiling point? At 77 °C, substance E has a vapor pressure of 145. torr and Substance F Substance E Substance F has a vapor pressure of 115. torr. Neither, E and F have the same boiling point. It's impossible to know without more information. O O O O
Chemistry for Engineering Students
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Chapter8: Molecules And Materials
Section: Chapter Questions
Problem 8.84PAE
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Understanding the connection between vapour pressure, boiling point, and enthalpy of vaporisation.
Transcribed Image Text:Use the observation in the first column to answer the question in the second column.
observation
question
Which has a higher vapor pressure?
At 1 atm pressure,
Substance C
Substance C boils at
145. °C and Substance D
Substance D
boils at 128. °C.
Neither, C and D have the same vapor pressure.
It's impossible to know without more information.
Which has the higher boiling point?
Substance A
The enthalpy of vaporization
of Substance A is smaller
Substance B
than that of Substance B.
Neither, A and B have the same boiling point.
It's impossible to know without more information.
Which has a higher boiling point?
At 77 °C, substance E has
a vapor pressure of
145. torr and Substance F
Substance E
Substance F
has a vapor pressure of
115. torr.
Neither, E and F have the same boiling point.
It's impossible to know without more information.
O O O O
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