Theory

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# Theory - PowerPoint PPT Presentation

Theory. Units. Which Formula. Problems. Wild Card. 100. 100. 100. 100. 100. 2 00. 2 00. 2 00. 2 00. 2 00. 300. 300. 300. 300. 300. 400. 400. 400. 400. 400. 5 00. 5 00. 5 00. 5 00. 5 00. Theory 100. Gas pressure is caused by:

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Presentation Transcript

Theory

Units

Which Formula

Problems

Wild Card

100

100

100

100

100

200

200

200

200

200

300

300

300

300

300

400

400

400

400

400

500

500

500

500

500

Theory 100
• Gas pressure is caused by:

A - gas molecules reacting with other gas molecules

B - gas molecules hitting the walls of a container

C - gas molecules heating up

D - gas molecules hitting other gas molecules

Theory 100
• Gas pressure is caused by:

B - gas molecules hitting the walls of a container

Main

Theory 200
• Each of these flasks contains the same number of gas molecules. In which would the pressure be highest?

Theory 200
• Each of these flasks contains the same number of gas molecules. In which would the pressure be highest?

Main

Theory 300
• At a temperature of 25°C and a pressure of 1atm, which of the following molecules will effuse the most rapidly?
• A - oxygen, O2
• B - carbon dioxide, CO2
• C - hydrogen chloride, HCl
• D - nitrogen, N2

Theory 300
• At a temperature of 25°C and a pressure of 1atm, which of the following molecules will effuse the most rapidly?
• D - nitrogen, N2

Main

Theory 400
• As the temperature of the gas in a balloon decreases, which of the following occurs?
• A – The average kinetic energy of the gas decreases
• B – The gas pressure inside the balloon increases
• C – The volume of the balloon increases
• D – All of the above

Theory 400
• As the temperature of the gas in a balloon decreases, which of the following occurs?
• A – The average kinetic energy of the gas decreases

Main

Theory 500
• At a certain temperature and pressure, 2 mol of carbon dioxide has a volume of 3L. A 3L sample of hydrogen at the same temperature and pressure___.
• A – contains the same number of atoms
• B – has a higher density
• C – contains the same number of molecules
• D – has the same mass

Theory 500
• At a certain temperature and pressure, 2 mol of carbon dioxide has a volume of 3L. A 3L sample of hydrogen at the same temperature and pressure___.
• C – contains the same number of molecules

Main

Units 100

Convert to Kelvin:

15°C

Units 100

Convert to Kelvin:

15°C

15 + 273 = 288K

Main

Units 200

Convert to Celsius:

100K

Units 200

Convert to Celsius:

100K

100-273 = -173°C

Main

Units 300

In the ideal gas law, what is the value of R?

Units 300

In the ideal gas law, what is the value of R?

R = 0.0821 L•atm/K•mol

Main

Units 400

Convert to atm’s:

123.4 kPa

Units 400

Convert to atm’s:

123.4 kPa

123.4 kpa x (1atm/101.325kpa) = 1.218 atm

Main

Units 500

What is standard pressure and temperature?

Units 500

What is standard pressure and temperature?

T = 273K

P = 1atm

Main

Which Formula 100
• A sample of nitrogen occupies a volume of 250 ml at 25°C. What volume will it occupy at 95°C?

Which Formula 100
• A sample of nitrogen occupies a volume of 250 ml at 25°C. What volume will it occupy at 95°C?
• Charles’ Law: V1/T1 = V2/T2

Main

Which Formula 200
• A 175 ml sample of neon gas had its pressure changed from 75 kPa to 150 kPa. What is the new volume?

Which Formula 200
• A 175 ml sample of neon gas had its pressure changed from 75 kPa to 150 kPa. What is the new volume?

Boyle’s Law: P1 x V1 = P2 x V2

Main

Which Formula 300
• A rigid container of O2 has a pressure of 185 kPa at a temperature of 458 K. What is the pressure at 283 K?

Which Formula 300
• A rigid container of O2 has a pressure of 185 kPa at a temperature of 458 K. What is the pressure at 283 K?
• Gay Lussac’sLaw : P1 / T1 = P2 / T2

Main

Which Formula 400
• Chlorine gas exerts a pressure of 900 torr. When the pressure is changed to 1.35 atm, it’s volume is 250 ml. What was the original volume?

Which Formula 400
• Chlorine gas exerts a pressure of 900 torr. When the pressure is changed to 1.35 atm, it’s volume is 250 ml. What was the original volume?

Gay-Lassac’s: P1 x V1 = P2 x V2

Main

Which Formula 500
• What is the volume occupied by 95 grams of chlorine gas at STP?

Which Formula 500
• What is the volume occupied by 95 grams of chlorine gas at STP?

Ideal: PV = nRT

Main

Problems 100
• How many moles of nitrogen are in a flask with a volume of 150.0 ml at a pressure of 200.0 kPa and a temperature of 250 K

Problems 100
• How many moles of nitrogen are in a flask with a volume of 150.0 ml at a pressure of 200.0 kPa and a temperature of 250 K

n = .014 moles

Main

Problems 200

A small sample of helium gas occupies 6 mL at a temperature of 250 K. At what temperature does the volume expand to 9 mL?

Problems 200

A small sample of helium gas occupies 6 mL at a temperature of 250 K. At what temperature does the volume expand to 9 mL?

375 K

Main

Problems 300

When a supply of hydrogen gas is held in a 4.00 liter container at 320 K it exerts a pressure of 1.05 atm. The supply is moved to a 2.00 liter container, and cooled to 160 K. What is the new pressure of the confined gas.

Problems 300

When a supply of hydrogen gas is held in a 4.00 liter container at 320 K it exerts a pressure of 1.05 atm. The supply is moved to a 2.00 liter container, and cooled to 160 K. What is the new pressure of the confined gas

P = 1.05 atm

Main

Problems 400

A sample of helium gas diffuses at .0659 m/s at a certain temperature. Calculate the velocity of chlorine gas at the same temperature.

Problems 400

A sample of helium gas diffuses at .0659 m/s at a certain temperature. Calculate the velocity of chlorine gas at the same temperature.

V2 = .0221 m/s

Main

Problems 500

A mixture of gases at a total pressure of 95 kPa contains N2, CO2 and O2. The partial pressure of CO2 is 24 kPa, and the partial pressure of N2 is 35 kPa. What is the pressure of O2 in atms?

Problems 500

A mixture of gases at a total pressure of 95 kPa contains N2, CO2 and O2. The partial pressure of CO2 is 24 kPa, and the partial pressure of N2 is 35 kPa. What is the pressure of O2 in atms?

.36 atm

Main

Wild Card 100

As the temperature of a fixed volume of gas increases, the pressure will ______.

Wild Card 100

As the temperature of a fixed volume of gas increases, the pressure will ______.

• Increase

Main

Wild Card 200

.A gas occupies a volume of 120. ml at 25.0°C and 97.0 kPa. What is the volume of the gas at STP?

Wild Card 200

.A gas occupies a volume of 120. ml at 25.0°C and 97 kPa. What is the volume of the gas at STP?

V2 = .105L

Main

Wild Card 300

Given the following chemical equation:

CH4+ 2O2 -> CO2 + 2H2O

What volume of steam H2O will be produced at 35°C and 2.6 atm if .875 mol of CH4 completely react with excess oxygen?

Wild Card 300

Given the following chemical equation:

CH4+ 2O2 -> CO2 + 2H2O

What volume of steam H2O will be produced at 35°C and 2.6 atm if .875 mol of CH4 completely react with excess oxygen?

17L

Main

Wild Card 400

The volume of a gas is tripled while the temperature is held constant. How does the gas pressure change?

A – It is also tripled

B – It is reduced by one third

C – It does not change

D – It depends on the type of gas

Wild Card 400

The volume of a gas is tripled while the temperature is held constant. How does the gas pressure change?

B – It is reduced by one third

Main

Wild Card 500

A 15.50 gram sample of a gas exerts a pressure of 1.40 atmospheres when held in an 8.00 liter at 22 °C. What is the molar mass of the gas?