Conceptual Questions
When temperature is constant with a fixed mass, what is the relationship between volume and pressure (inveresly or directly proportional?)
Inversely
A gas occupies 4.5 L at 300 K. If the temperature is increased to 60°C, what will be the new volume of the gas, assuming pressure remains constant?
5.0 L
A gas at 2.0 atm, 3.0 L, and 25°C is compressed to 1.5 L and heated to 100°C. What is the new pressure?
5.0 atm
How many liters of oxygen gas are present at STP if you have 4.0 moles of O₂?
89.6 L
A sample of nitrogen gas is at 2.0 atm, 298 K, and contains 0.5 mol. What is the volume of the gas in liters?
6.12 L
At a constant pressure with a fixed mass, what is the relationship between volume and temperature?
Directly proportional
A gas has a volume of 2.5 L at 1.2 atm. If the pressure is increased to 2.4 atm, what will the volume be?
1.25 L
A gas occupies 5.0 L at 750 mmHg and 20°C. If the pressure increases to 900 mmHg and the temperature rises to 80°C, what is the final volume?
5.0 L
If you have 67.2 L of carbon dioxide gas at STP, how many moles are present?
3.0 mol
A 3.0 mol sample of helium gas occupies 24.0 L at 300 K. What is the pressure of the gas in atmospheres?
3.08 atm
At a constant volume, what is the relationship between pressure and temperature?
directly proportional
A gas is at 2.0 atm and 25°C. If the temperature is raised to 100°C, what will be the new pressure if the volume remains constant?
2.50 atm
A gas at 1.5 atm, 4.0 L, and 0°C is expanded to 8.0 L and 0.75 atm. What is the final temperature in Celsius?
A gas occupies 10.0 L with 0.5 moles of gas. How much volume will it occupy if the amount of gas is increased to 1.5 moles, assuming constant temperature and pressure?
30 L
A gas sample has a pressure of 750 mmHg, a volume of 10.0 L, and a temperature of 273 K. How many moles of gas are present?
0.441 mol
What is STP? And what are the amounts of each unit?
Standard temperature and pressure
Temperature = 0 celsius
Pressure = 1 atm
Amount = 1 mol
A gas occupies 10.0 L at 760 mmHg. If the volume is compressed to 5.0 L, what will be the new pressure?
1520 mmHg
A gas is at 2.5 L, 400 mmHg, and 50°C. If the volume decreases to 1.0 L and the temperature drops to -30°C, what was the initial pressure?
213 mmHg
A gas occupies 18.0 L when it contains 0.8 moles of gas. How many moles of gas are present if the volume is increased to 45.0 L, assuming constant temperature and pressure?
2 mol
A gas has a pressure of 202.6 kPa, a volume of 5.0 L, and contains 0.2 mol. What is the temperature in Kelvin?
609 K
What is avogadro's priniciple?
Equal volumes of gases at the same temperature and pressure contain equal numbers of particles
A gas occupies 6.0 L at 27°C. If the volume of the gas increases to 9.0 L, what is the new temperature in Celsius, assuming pressure remains constant?
177 degrees celsius
A gas is at 1.2 atm, 10°C, and 8.0 L. If the pressure drops to 0.8 atm and the temperature decreases to -20°C, what was the initial volume?
6.0 L
If a gas occupies 50.0 L with 2.5 moles, what was the original volume if it originally had 1.0 mole of gas, assuming constant temperature and pressure?
20 L
A 2.0 mol sample of nitrogen gas occupies 20.0 L at 350 K. What is the pressure of the gas in mmHg?
2180 mmHg