CHEM 1127Q Lecture Notes - Lecture 28: Joule, Phase Diagram, Triple Point

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Liquids and solids are very different from gas: liquids and solids are essentially in molecular contact with each other. Ideal gas law assumed that intermolecular collisions didn"t matter. As long as there is liquid in the container there is an amount of vapor in the container equal to the vapor pressure. It is in a room with a volume of 100,000 l at. On the day after the pool was completed you filled it with exactly 10,000 l of water. The vapor pressure of water at 25oc is 24mm hg. Air in the room was dry before the water was in it. Room has 100,000 l of air & 10,000 l of water. Some of the water will pop off and form water vapor. Pv = nrt n = moles of water. R = 0. 0821 l atm / mole k. P = 24 mm hg /760mm hg per atm n will = 129. 07 moles h2o x 18 g/moles.

Related Questions

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 __________ ________.

1.A gas sample has a volume of 235 $m L$ at 24 $^{\circ} C$ . What is its volume at 98 $^{\circ} C$ ?

2.A sample of ideal gas is in a sealed container. The pressure of the gas is 475

t o r r

, and the temperature is 2

^{\circ} C

. If the temperature changes to 88

^{\circ} C

with no change in volume or amount of gas, what is the new pressure,

P_{2} P_2

, of the gas inside the container?

Express your answer with the appropriate units.

3.Using the same sample of gas (

P_{1} P_1

= 475

t o r r

T_{1}

= 2

^{\circ} C

), we wish to change the pressure to 4750

t o r r

with no accompanying change in volume or amount of gas. What temperature

T_{2}

, in Celsius, is needed to reach this pressure?

Express your answer with the appropriate units.

4.A very flexible helium-filled balloon is released from the ground into the air at 20.

^{\circ} C

The initial volume of the balloon is 5.00

L

, and the pressure is 760.

m m H g

. The balloon ascends to an altitude of 20

k m

, where the pressure is 76.0

m m H g

and the temperature is

-

50.

^{\circ} C

. What is the new volume,

V_{2} V_2

, of the balloon in liters, assuming it doesn't break or leak?

Express your answer with the appropriate units.

5.Consider 4.70

L

of a gas at 365

m m H g

and 20.

^{\circ} C

. If the container is compressed to 2.80

L

and the temperature is increased to 36

^{\circ} C

, what is the new pressure,

P_{2} P_2

, inside the container? Assume no change in the amount of gas inside the cylinder.

Express your answer with the appropriate units.

As the temperature of a liquid is lowered, what happens to its vapor pressure?

Its vapor pressure is independent of temperature.

Its vapor pressure first rises then falls.

The vapor pressure may rise or drop depending on the liquid.

Its vapor pressure rises.

Its vapor pressure drops.

tealdog287

The excess internal energy of metabolism is exhausted through a variety of channels, such as through radiation and evaporation of perspiration. Consider another pathway for energy loss: moisture in exhaled breath. Suppose you breathe out 22.0 breaths per minute, each with a volume of 0.600 L. Suppose also that you inhale dry air and exhale at 37^oC containing water vapor with a vapor pressure of 3.20 kPa. The vapor comes from the evaporation of liquid water in your body. Model the water vapor as an ideal gas. Assume its latent heat of evaporation at 37^oC is the same as its heat of vaporization at 100^oC. Calculate the rate at which you lose energy by exhaling humid air.

erinrhinoceros274

CHEM 1127Q Lecture Notes - Lecture 28: Joule, Phase Diagram, Triple Point

CHEM 1127Q Full Course Notes

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