Homework Answers
The vapor pressure of a liquid or solid is the equilibrium pressure of a vapour above its liquid (or solid); that is, the pressure of the vapor resulting from evaporation of a liquid (or solid) above a sample of the liquid (or solid) in a closed container. Examples:
| substance | vapor pressure at 25oC |
| diethyl ether | 0.7 atm |
| bromine | 0.3 atm |
| ethyl alcohol | 0.08 atm |
| water | 0.03 atm |
As the temperature of a liquid or solid increases its vapor pressure also increases. Conversely, vapor pressure decreases as the temperature decreases.
Naphthalene, C10H8, melts at 80.0 ˚C; the vapor pressure of the solid is 1.00 torr at 52.6 ˚C, and that of the liquid is...
Naphthalene, C10H8, melts at 80.0 ˚C; the vapor pressure of the solid is 1.00 torr at 52.6 ˚C, and that of the liquid is 10.0 torr at 85.8 ˚C and 40.0 torr at 119.3 ˚C. Calculate: (a) the enthalpy of vaporization, the normal boiling point, and the entropy of vaporization at the boiling point; (b) the vapor pressure at the melting point (Hint: liquid and solid are in equilibrium there)
Vapor pressure of a liquid is A. None of the above B. Total pressure exerted by...
Vapor pressure of a liquid is A. None of the above B. Total pressure exerted by the liquid molecules on the surface and the air on the container C. Pressure exerted by the vapor of the liquid in equilibrium with liquid molecules on the surface of the liquid D. Pressure exerted by air on the surface of the liquid E. Pressure exerted by the liquid molecules of the surface of the liquid on the air above its surface
Solid iodine has a vapor pressure of 1.0 mmHg at 39°C. How many moles of iodine...
Solid iodine has a vapor pressure of 1.0 mmHg at 39°C. How many moles of iodine will sublime into a 500. mL flask at this temperature? If the volume of the flask is doubled at constant temperature, what will happen to the equilibrium vapor pressure of I2? (Assume some solid I2 is always present in the container.)
How is vapor pressure related to temperature? What happens to the vapor pressure of a substance...
How is vapor pressure related to temperature? What happens to the vapor pressure of a substance when the temperature is increased? Decreased? Check all that apply. The relationship between vapor pressure and temperature is not linear, but rather, it is exponential. The relationship between vapor pressure and temperature is linear. The vapor pressure of a liquid decreases with increasing temperature. The vapor pressure of a liquid increases with increasing temperature.
4. Liquid ammonia has a vapor pressure of 109 mm Hg at-66°C and a heat of...
4. Liquid ammonia has a vapor pressure of 109 mm Hg at-66°C and a heat of vaporization of 2.46 x 10 J/mol. a) Estimate the normal boiling point of ammonia. b) Estimate the ratio of the vapor pressure at -66°C to that at -45°C
4. Liquid ammonia has a vapor pressure of 109 mm Hg at-66°C and a heat of vaporization of 2.46 x 10 J/mol. a) Estimate the normal boiling point of ammonia. b) Estimate the ratio of the...
The vapor pressure of the liquid HF is measured at different temperatures. The following vapor pressure...
The vapor pressure of the liquid HF is measured at different temperatures. The following vapor pressure data are obtained: Temperature 270.6K and 287.5K, Pressure 324.5 mmHg and 626.9 mmHG. Calculate the enthapy of vaporization ( delta H vap ) in kJ/mol for this liquid.
What is the vap of a liquid that has a vapor pressure of 612 torr at...
What is the
vap of a liquid that has a vapor pressure of 612 torr at
84.6oC and a boiling point of 96.9oC at 1
atm?
At 300 K, the vapor pressure of pure liquid A and B is 200 mmHg and...
At 300 K, the vapor pressure of pure liquid A and B is 200 mmHg and 450 mmHg, respectively. If the total pressure of the mixture A and B is 350 mmHg and the assumption that the solution is ideal, calculate: (a) Mole fraction of A and B in liquid phase and vapor phase, (b) The activity and activity coefficient of A and B in the solution, and (c) The mixing free energy, Agm, and the mixing entropy, Asm, of...
For a given pure substance, vapor pressure values were determined experimentally in equilibrium with the solid...
For a given pure substance, vapor pressure values were determined experimentally in equilibrium with the solid and liquid phases, at different temperatures, from which the following ratios were deduced: Solid / vapor equilibrium: ln (p / mmHg) = 17.44 - 939.7 / (T / K) Liquid / vapor balance: ln (p / mmHg) = 16.02 - 820.0 / (T / K) a) Determine the coordinates (p, T) of the triple point of the substance. b) Assuming that the enthalpy values...
cion 10 of 16 > A certain liquid has a vapor pressure of 92.0 Torr at...
cion 10 of 16 > A certain liquid has a vapor pressure of 92.0 Torr at 23.0' and 274.0 Torr at 45.0'C. Calculate the value of Hip for this liquid. A Hap = kJ/mol TOOLS Calculate t x10 is liquid. boiling point: Question Source: MRG-General Chemistry | Publisher: University Schem about us Careers privacy policy terms of use contact us help
4. Liquid ammonia has a vapor pressure of 109 mm Hg at-66°C and a heat of vaporization of 2.46 x 10 J/mol. a) Estimate the normal boiling point of ammonia. b) Estimate the ratio of the vapor pressure at -66°C to that at -45°C
4. Liquid ammonia has a vapor pressure of 109 mm Hg at-66°C and a heat of vaporization of 2.46 x 10 J/mol. a) Estimate the normal boiling point of ammonia. b) Estimate the ratio of the...
What is the
vap of a liquid that has a vapor pressure of 612 torr at
84.6oC and a boiling point of 96.9oC at 1
atm?
At 300 K, the vapor pressure of pure liquid A and B is 200 mmHg and 450 mmHg, respectively. If the total pressure of the mixture A and B is 350 mmHg and the assumption that the solution is ideal, calculate: (a) Mole fraction of A and B in liquid phase and vapor phase, (b) The activity and activity coefficient of A and B in the solution, and (c) The mixing free energy, Agm, and the mixing entropy, Asm, of...
cion 10 of 16 > A certain liquid has a vapor pressure of 92.0 Torr at 23.0' and 274.0 Torr at 45.0'C. Calculate the value of Hip for this liquid. A Hap = kJ/mol TOOLS Calculate t x10 is liquid. boiling point: Question Source: MRG-General Chemistry | Publisher: University Schem about us Careers privacy policy terms of use contact us help
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