Two liquids, X and Y, were placed in separate beakers covered with watch glasses. After 5 minutes, the watch glass of liquid X was filled with droplets while that of liquid Y was still dry-looking. Based on the information above, which of these two: 1. has a higher surface tension at a fixed temperature? 2. has a higher vapor pressure? 3. will boil off more easily? A handbook lists the normal boiling point of isooctane, a gasoline component, as 99.2°C and its enthalpy of vaporization as 35.76 kJ mol-1. Calculate the vapor pressure of isooctane at 25°C. А. 128 atm B. 0.0564 atm C. 0.00133 atm D. 17.7 atm Fractional distillation is used to separate the components of a liquid mixture by gradually increasing the temperature and collecting each component that vaporizes. If a mixture contains the following components (listed in the choices) is subjected to fractional distillation, which will be collected last? А. (CН)3СОН В. (CНн)зСН C. CH3CH20H D. CH3CH2CH2CH2OH A certain solid substance that is very hard, has a high melting point, and is nonconducting unless melted is most likely to be: A. I2 В. СО2 C. Nacl D. Cu
Two liquids, X and Y, were placed in separate beakers covered with watch glasses. After 5 minutes, the watch glass of liquid X was filled with droplets while that of liquid Y was still dry-looking. Based on the information above, which of these two: 1. has a higher surface tension at a fixed temperature? 2. has a higher vapor pressure? 3. will boil off more easily? A handbook lists the normal boiling point of isooctane, a gasoline component, as 99.2°C and its enthalpy of vaporization as 35.76 kJ mol-1. Calculate the vapor pressure of isooctane at 25°C. А. 128 atm B. 0.0564 atm C. 0.00133 atm D. 17.7 atm Fractional distillation is used to separate the components of a liquid mixture by gradually increasing the temperature and collecting each component that vaporizes. If a mixture contains the following components (listed in the choices) is subjected to fractional distillation, which will be collected last? А. (CН)3СОН В. (CНн)зСН C. CH3CH20H D. CH3CH2CH2CH2OH A certain solid substance that is very hard, has a high melting point, and is nonconducting unless melted is most likely to be: A. I2 В. СО2 C. Nacl D. Cu
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter11: Liquids And Solids
Section: Chapter Questions
Problem 11.97QE
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Transcribed Image Text:Two liquids, X and Y, were placed in separate beakers covered with watch glasses. After 5 minutes, the watch glass
of liquid X was filled with droplets while that of liquid Y was still dry-looking.
Based on the information above, which of these two:
1. has a higher surface tension at a fixed temperature?
2. has a higher vapor pressure?
3. will boil off more easily?
A handbook lists the normal boiling point of isooctane, a gasoline component, as 99.2°C and its enthalpy of
vaporization as 35.76 kJ mol1. Calculate the vapor pressure of isooctane at 25°C.
А. 128 atm
B. 0.0564 atm
C. 0.00133 atm
D. 17.7 atm
Fractional distillation is used to separate the components of a liquid mixture by gradually increasing the temperature
and collecting each component that vaporizes. If a mixture contains the following components (listed in the choices)
is subjected to fractional distillation, which will be collected last?
А. (CH)3СОН
В. (CН:)зСH
C. CH3CH20H
D. CH3CH2CH2CH2OH
A certain solid substance that is very hard, has a high melting point, and is nonconducting unless melted is most
likely to be:
A. I2
В. СО2
C. Nacl
D. Cu
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