CHM 2046C Lecture Notes - Lecture 3: Dynamic Equilibrium, Boiling Point

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emeraldwasp603

16 Jan 2018

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1/12/18: liquid its opposite condensation, the two key properties we need to describe are evaporation (vaporization) and, evaporation: liquid to vapor (adding energy: breaking im bonds. H+: condensation: vapor to liquid (energy is removed: making im bonds. H : 3 factors that increase the rate of evaporation. (constant pressure, surface area, magnitude of im forces, at a higher temperature, more molecules have enough kinetic energy to break. If external pressure = 760 mmhg the temperature of boiling is the normal boiling point: liquid: strong imf high boiling point - high vaporization - low vapor pressure. Weak imf low boiling point low vaporization high vaporization pressure v; st decreases.

Related Questions

At what temperature is the equilibrium vapor pressure of water about 400 torr?

Choose one answer.

	a. 30^oC
	b. 45^oC
	c. 60^oC
	d. 80^oC

Which of the following statements are true about evaporation for a liquid?

Help: Evaporation

Choose at least one answer.

	a. Only the most energetic molecules evaporate.
	b. This means the average kinetic energy of the remaining molecules decrease.
	c. This has no effect on the average kinetic energy of the remaining molecules.
	d. Consequently, the temperature of the remaining liquid drops, that is, evaporation is a cooling process.
	e. Consequently, the temperature of the remaining liquid stays the same.

All but one of the following statement is true. Using your everyday experience, check the false one.

Choose one answer.

	a. Evaporation takes place from the surface of water.
	b. A cup of soup in a bowl cools more slowly than a cup of soup on a large plate.
	c. Hot water evaporates from a pan faster than cool water.
	d. Water evaporates as a gas or vapor.
	e. The vapor pressure of room temperature water in a sealed glass continues to rise until the glass breaks.
	f. The vapor pressure of room temperature water in a sealed glass reaches an equilibrium vapor pressure, that is, the evaporation rate of water equals its condensation rate from the gas phase.

I just need help with the last two problems

WORD BANK:

Atomic solids

Body-centered cubic

Boiling point

Condensation

Covalent atomic solids

Crystal lattice

Crystalline solids

Distillate

Distillation

Dynamic equilibrium

Evaporation

Face-centered cubic

Freezing

Freezing point

Ionic solids

Intramolecular

Interionic forces

Intermolecular forces

Liquid State

Macromolecule

Melting

Melting point

Metallic atomic solids

Molar heat of fusion

Molar heat of vaporization

Molecular solids

Non-bonding atomic solids

Non-crystalline (amorphous) solids

Properties of Liquids

Properties of Solids

Simple cubic

Solid State

Sublimation

Surface tension

Surfactants

Vapor pressure

Vaporization

Viscosity

Wetting action

Use the Vocabulary words above to complete the following sentences words can be used more than once, some words are not be used.

d. The molecules of a ________ are in constant motion. e. The __________ of a liquid is related to the shape of the molecules that make up the liquid. f. The force of attraction that causes the surface of a liquid to contract and form a âbeadâ or spherical drop is called? _________ _______ g. Chemical that reduce surface tension are called? __________ h. A liquids ability to spread out evenly over a surface as a thin film is called itâs? _________ _______ i. ____________ is the process by which molecules of a liquid break away and go into the gas phase. j. When the molecules of a volatile liquid jump to gas phase it is called _________. k. The reverse of evaporation (the conversion of a vapor to a liquid) is called? _________ l. When the rate at which the water is evaporating is equal to the rate at which the water vapor is condensing, you have established a __________ _________. m. ________ _______ is the partial pressure of a gas in dynamic equilibrium with its liquid. n. ________ _______ is when the vapor pressure equals the atmospheric pressure. o. Boiling point can be used to purify a solution of two or more substances by ________. p. The condensed vapor sample is called the? ________ q. The exact quantity of heat required to vaporize 1 mole of a liquid at constant pressure and temperature is called the ________ ________ ___ __________. r. In ________________ __________ the particles do not have a definite or regular order (there is no repeating pattern throughout the solid). s. In ____________ __________, the particles are arranged in regular, systematic patterns called a ________ _________. t. The three different types of crystal lattices based on the cube are? ________ ______, _____________ ______, and ___________, ________. u. The three types of atomic solids include _________ _____, ___________ ______, and __________ ________.

CHM 2046C Lecture Notes - Lecture 3: Dynamic Equilibrium, Boiling Point

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