CHEE 3525 Lecture Notes - Lecture 5: Gas Constant, Specific Volume, Pressure Measurement

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12 Jun 2016

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Equal volumes of different gases at the same temperature and pressure contain equal numbers of molecules. Boyle"s law pv = a constant, at constant temperature, for a fixed quantity of gas p1v1 = p2v2. The volume of any gas increases linearly with increasing temperature when the pressure and the quantity of gas are held constant. 2 a constant, at constant p and n. The volume of a gas depends on the temperature, the pressure, and the quantity of the gas the ideal gas law: Rnt p p or pv = nrt pv. = density v = specific volume (1/ ) R = a gas constant (gas-specific) [for air, the value of r = 287 nm kg-1 k-1] Since = g, the ideal gas law may also be written: gp. Example: (a) calculate the density, specific weight, and specific volume of oxygen at 20 c and.

Related Questions

The ideal gas law relates the pressure P, volume V, absolutetemperature T, and amount of gas n. The law is P = nRT/V where R isthe gas constant.

An engineer must design a large natural gas storage tank to beexpandable to maintain the pressure constant at 2.2 atm. InDecember when the temperature is 4 degrees Farenheight (-15 C), thevolume of gas in the tank is 28,500 ft^3. What will the volume ofthe same quantity of gas be in July when the temperature is 88 F(31 C)? (Hint: Use the fact that n, R, and P are constant in theproblem. Note also that K = C + 273.2

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

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CHEE 3525 Lecture Notes - Lecture 5: Gas Constant, Specific Volume, Pressure Measurement

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