CHEM-UA 127 Chapter Notes - Chapter 5-7: Electric Dipole Moment, Ideal Gas Law, Molar Volume

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17 Feb 2016

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The nature of gases: observing gases, samples of gases large enough to study: bulk matter; forms of matter that consists of large numbers of molecules readily compressible b, pressure, force/area; arises from the impact of its molecules. Graham"s law of effusion : rate of effusion of a molecules /rate of effusion of b molecules= . Time for a effuse/time for b effuse. Rateof effusion at t 2/ rate of effusionat t 1= . Intermolecular forces: origin of intermolecular forces, condensed phases (when a gas is cooled it condenses to either a liquid or solid) form when attractive forces b/w molecules pull them together; repulsions dominate at short separations. 74% of the crystal"s space is occupied by atoms holes (26%) can be filled w/smaller atoms to form alloys. Substances that do not contain carbon or are pure carbon. Usually provide hard matter, organic provides both hard and soft matter.

Related Questions

Part 1 Boyle’s Law P1 V1 = P2 V2 when Temperature is constant; being 1 “initial” and 2 “final” A container of oxygen gas has a volume of 150 mL when its pressure is 0.947 atm. If the temperature remains constant. What will the volume of the gas be at a pressure of 0.987 atm? Using Boyle’s Law solve for V2 of final volume using P1 V1 = P2 V2 Match the correspondent given data, unknown data and resulted in data after solved

___1. Initial Volume or V1

___2. Final Pressure or P2

___3. Initial pressure or P1

___4. Final V2

___5 Temperature

A. does not change, remains constant

B. 144 mL of oxygen

C. 0.947 atm

D. 150 mL of oxygen

E. 130 mL of oxygen

F. 0.987 atm

Part 2 Charles’s Law V1/T1=V2/T2 when the Pressure is constant; being 1 “initial” and 2 “final A container with hydrogen gas has a volume of 349 mL, at a temperature of 22.0C (Change to K), What volume will the gas occupy at 50C(Change to K), if the pressure remains constant?

____6. Final Volume of gas

____7 Initial Temperature gas

____8. Final Temperature gas

____9. Initial Volume gas

____10. The pressure of hydrogen

G. It’s constant

H. 295 K

I. 349 mL

J. 382 mL

K. 323 K

L. 50 C

Part 3 Gay-Lussac Law P1/T1=P2 when the volume (V) is constant A cylinder of a gas has a pressure of 4.40 atm at 25C (Change to K). At what temperature in Celsius will it reach a pressure of 6.50 atm C= K-273

____11. Final Pressure of gas (P1)

____12. The initial temperature in K (T1)

____13. The initial Pressure of gas (P2)

____14. The volume of the gas

_____15. The final temperature of the gas

M. 6.50 atm

N. 298 K

O. 4.40 atm

P. 167 C

Q . 283 K

R. is constant

Part 4 Combined Gas Law P1 V1/ T1 = P2 V2/ T2 OR MORE EASY TO SOLVE P1 V1 T2= P2 V2 T1 A St. Valentine Helium-filled balloon for your love, has a volume of 50.0 mL at 25 C (change to K) and 1.08 atm. What volume(V2) will it have at 0.855 atm and 10.0C (change to K). K=C + 273

_____16. The Final Temperature in K (T1)

_____17. The initial Volume in mL (V1)

_____18. The final Pressure in atm (P2)

_____19. The initial temperature in C (T1)

_____20. The final volume (V2)

S. 298k

T. 50.0 mL

U. 0.855 atm

V. 25 C

W. 283 K

X. 60.00 mL

Part 5 Answer with the letter in the blank. A. Boyles’s Law B. Charles’s Law C. Gay-Lussac’s Law D. Combined Gas Law E. Avogadro’s Law

___21. One mol of any gas at Standard Temperature and Pressure contains 6.03 X10^23 molecules and occupy a volume of 22.4L

____22. The higher the pressure the lower the volume when the temperature is constant.

____23. The higher the temperature the higher the volume when the pressure is constant.

____24 The higher the temperature the higher is the pressure when the volume is constant.

____25. There is a relation between pressure, volume, and temperature of a fixed amount (moles)of gas

coffeeelephant81

When performing a calorimetry experiment, a metal is heated to100^oC and then immersed in a Styrofoam cup containing100g of water at a temperature of 22^oC. Describe thetransfer of heat assuming none is lost to theenvironment.

Heat will transfer from the water to the metal increasing thetemperature of the metal.
Heat will transfer from the water to the metal decreasing thetemperature of the water.
Heat is transferred from the metal to the water in an endothermicfashion with respect to the metal.
Heat is transferred from the metal to the water in an exothermicfashion with respect to the metal.
No heat is transferred because heat is not lost to theenvironment.

The Ideal Gas Law is PV= nRT. Which of the following relationshipsis (are) true for gases?

The number of moles of a gas is directly proportional to itsvolume (at constant pressure).
The pressure of a gas is inversely proportional to itstemperature in Kelvins (at constant volume).
The volume of a gas is directly proportional to its pressure(at constant temperature).

1 only
2 only
3 only
1 and 2
2 and 3

Ammonia is prepared by reacting nitrogen and hydrogen gases athigh temperature according to the unbalanced chemical equationbelow.

_ N₂(g) + _H₂(g) Ã¢â â_NH₃(g)

What are the respective coefficients when the equation isbalanced with the smallest whole numbers?

1,1,1
1,3,1
1,3,2
2,1,2
2,3,2

The combustion of propane produces carbon dioxide and steam.

C₃H₈(g) + 5O₂(g) Ã¢â â 3CO₂(g) + 4H₂O(g)

All the following statements concerning this reaction arecorrect EXCEPT

Three molecules of carbon dioxide are formed per one molecule ofpropane consumed.
Five molecules of oxygen are consumed per one molecule propaneconsumed.
Four moles of steam are formed per five moles of oxygenconsumed.
The combined mass of reactants consumed equals the mass of productsformed.
Three grams of carbon dioxide are formed per five grams of oxygenconsumed.

CHEM-UA 127 Chapter Notes - Chapter 5-7: Electric Dipole Moment, Ideal Gas Law, Molar Volume

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