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Problem #1: What is the vapor pressure of an aqueous solution that has a solute mole fraction of 0.1000? The vapor pressure of water is 25.756 mmHg at 25 °C. Solution: χ solv = 1.0000 − 0.1000 = 0.9000 <--- solv means solvent. Use Raoult's Law: P solution = (χ solv) (P solv o) x = (0.9000) (25.756) x = 23.18 mmHg (to four sig figs)
Question #1: As temperature increases, what happens to the vapor pressure of each substance? Question #2: Which of these substances has the highest vapor pressure overall? Which has the lowest? Question #3: Which substance has the greatest intermolecular force strength?
13 lut 2023 · a) What effect does rising temperature have on vapor pressure? It increases, as can be seen by the positive slope. b) What must be true at the boiling point of a liquid? The vapor pressure must equal external pressure. c) If atmospheric pressure was 96 kPa, what would be the boiling point of the substance whose vapor pressure you graphed? 135 C
13 lip 2017 · Vapor Pressure Worksheet. Vapor pressure curves of several liquids Vapor pressure (y-axis) is shown as a function of temperature for several liquids. For all, the vapor pressure increases with temperature. Shown are: (a) carbon disulfide, CS2; (b) methanol, CH3OH; (c) ethanol, CH3CH2OH; (d) water, H2O; (e) aniline, C6H5NH2.
The vapor pressure of a liquid decreases as the strength of its intermolecular forces increases. PROBLEM \(\PageIndex{4}\) What is the relationship between the intermolecular forces in a solid and its melting temperature?
The vapor pressure of pure A is 0.700 atm at the normal boiling point of a solution prepared from 0.250 mole of B and 0.650 mole of A . What is the vapor pressure
Key Worksheet 4: Raoult’s Law Objective: To understand and apply Raoult’s law. When a nonvolatile solute is added to a liquid the vapor pressure of the resulting solution is lowered compared to the vapor pressure of the pure solvent at the same temperature. Psolution = csolvent·P0solvent
