Homework Answers
The higher is the vapor pressure of a liquid at a given temperature, the lower the normal boiling point of the liquid.
Hence, boiing point is inversly proportional to vapour pressure. So, increasing order of boiling point in given question
is - Ethyl amine(option c) < Diethyl ether(option A) < Acetone(option B).
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HQ11.22 Given below are the vapor pressures, in torr at 25° C, for three substances. Based...
Review Constants Pe Consider the following two substances and their vapor pressures at 298 K All...
Review Constants Pe Consider the following two substances and their vapor pressures at 298 K All liquids evaporate to a certain extent. The pressure exerted by the gas phase in equilibrium with the liquid is called vapor pressure. Prap. The vapor pressure of a particular substance is determined by the strength of the intermolecular forces. But for any given substance, the vapor pressure only changes with temperature. The Clausius-Clapeyron equation expresses the relationship between vapor pressure and temperature: Substance Vapor...
Determine the normal boiling point of a substance whose vapor pressure is 102 torr at 56°C...
Determine the normal boiling point of a substance whose vapor pressure is 102 torr at 56°C and has a AHvap of 32.1 kJ/mol.
figure 1 Figure 2 Liquid ethanol mm P increasing P = equilibrium vapor pressure P=0 Add...
figure 1
Figure 2
Liquid ethanol mm P increasing P = equilibrium vapor pressure P=0 Add System comes to equilibrium ethanol Evacuated flask, pressure zero Molecules begin to vaporize, pressure increases Molecules leave and enter liquid at equal rates, pressure reaches steady-state value 34.6 °C 78.3°C 100 °C Normal boiling point Diethyl ether Vapor pressure (torr) Ethyl alcohol (ethanol) Water Ethylene glycol 100 20 40 60 80 Temperature (°C) Copyright 2009 Pearson Prentice Hall,Inc. Click on: (Figure 2) and study...
The normal boiling point of diethyl ether is 34.5 degrees C. A solution containing a nonvolatile...
The normal boiling point of diethyl ether is 34.5 degrees C. A solution containing a nonvolatile solute dissolved in diethyl ether has a vapor pressure of 675 torr at 34.5 degrees C. What is the mole fraction of diethyl ether in the solution?
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 228.0 Torr...
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 228.0 Torr at 45.0 °C. Calculate the value of AHjap for this liquid. AHjap = KJ/mol Calculate the normal boiling point of this liquid. boiling point: : . . c
Use the vapour pressures (at 25 °C) of the pure substances below to answer the following...
Use the vapour pressures (at 25 °C) of the pure substances below to answer the following questions р* (КРa) Substance 3-methyl-1-butanol (C5H120) 0.315 ethyl formate (C3H602) 32.3 1. Determine the partial pressure (in kPa) of ethyl formate (C3H602) in the vapour phase (at 25 °C) over a solution for which the mole fraction of 3-methyl-1-butanol (C5H120) is 0.322. Report your answer to three significant figures in scientific notation. Tries 0/13 Submit Answer 2. A solution of 3-methyl-1-butanol (C5H120) and ethyl...
A certain liquid has a vapor pressure of 92.0 Torr at 23.0°C and 306.0 Torr at...
A certain liquid has a vapor pressure of 92.0 Torr at 23.0°C and 306.0 Torr at 45.0°C. Calculate the value of AH ap for this liquid. kJ/mol AHÇap Calculate the normal boiling point of this liquid. boiling point:
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)
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 221.0 Torr...
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 221.0 Torr at 45.0 °C. Calculate the value of AH vap for this liquid. AHMap = 1 41.69 kJ/mol Calculate the normal boiling point of this liquid. boiling point: 64.85
An aqueous solution of ethylene glycol, C2H6O2 has a vapor pressure of 22.4 torr at a...
An aqueous solution of ethylene glycol, C2H6O2 has a vapor pressure of 22.4 torr at a temperature of 25 C. What would be the normal boiling point of this solution? the Kb of water is 0.52 C/m and the vapor pressure of water at 25 C is 23.8 torr.
Review Constants Pe Consider the following two substances and their vapor pressures at 298 K All liquids evaporate to a certain extent. The pressure exerted by the gas phase in equilibrium with the liquid is called vapor pressure. Prap. The vapor pressure of a particular substance is determined by the strength of the intermolecular forces. But for any given substance, the vapor pressure only changes with temperature. The Clausius-Clapeyron equation expresses the relationship between vapor pressure and temperature: Substance Vapor...
Determine the normal boiling point of a substance whose vapor pressure is 102 torr at 56°C and has a AHvap of 32.1 kJ/mol.
figure 1
Figure 2
Liquid ethanol mm P increasing P = equilibrium vapor pressure P=0 Add System comes to equilibrium ethanol Evacuated flask, pressure zero Molecules begin to vaporize, pressure increases Molecules leave and enter liquid at equal rates, pressure reaches steady-state value 34.6 °C 78.3°C 100 °C Normal boiling point Diethyl ether Vapor pressure (torr) Ethyl alcohol (ethanol) Water Ethylene glycol 100 20 40 60 80 Temperature (°C) Copyright 2009 Pearson Prentice Hall,Inc. Click on: (Figure 2) and study...
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 228.0 Torr at 45.0 °C. Calculate the value of AHjap for this liquid. AHjap = KJ/mol Calculate the normal boiling point of this liquid. boiling point: : . . c
Use the vapour pressures (at 25 °C) of the pure substances below to answer the following questions р* (КРa) Substance 3-methyl-1-butanol (C5H120) 0.315 ethyl formate (C3H602) 32.3 1. Determine the partial pressure (in kPa) of ethyl formate (C3H602) in the vapour phase (at 25 °C) over a solution for which the mole fraction of 3-methyl-1-butanol (C5H120) is 0.322. Report your answer to three significant figures in scientific notation. Tries 0/13 Submit Answer 2. A solution of 3-methyl-1-butanol (C5H120) and ethyl...
A certain liquid has a vapor pressure of 92.0 Torr at 23.0°C and 306.0 Torr at 45.0°C. Calculate the value of AH ap for this liquid. kJ/mol AHÇap Calculate the normal boiling point of this liquid. boiling point:
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 221.0 Torr at 45.0 °C. Calculate the value of AH vap for this liquid. AHMap = 1 41.69 kJ/mol Calculate the normal boiling point of this liquid. boiling point: 64.85
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