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Words about Gases
Name that Law
Gas Challenges
Gassy Problems
Potpourri
100
gases consist of larger number of tiny particles, particles of a gas are in constant motion, the collisions between particles and their container are elastic, there are no attractive or repulsive forces between gas particles, and the average kinetic energy of the particles of a gas is directly proportional to the Kelvin temperature of the gas.
What is Kinetic Molecular Theory?
100
This law states the volume of a fixed mass of gas varies inversely with the pressure at constant temperature.
What is Boyle's Law?
100
A plastic weather balloon contains 65 L of helium (He2) at 20.0 C and 94.0 kPa. What is the mass of helium in the balloon?
What is 20. g He2 at 8.004 gram/mol
100
A sample of oxygen gas has a volume of 150. mL when its pressure is .947 atm. What will the volume of the gas be at a pressure of .987 atm if the temperature remains constant?
What is 144 mL O₂? (boyle's law)
100
Simple mathematics relationships between the volume, temperature, pressure, and quantity of gases.
What are Gas Laws?
200
a net transport of molecules from a region of higher concentration to one of lower concentration by random molecular motion.
What is Diffusion?
200
This law states the volume of a fixed mass of gas at a constant pressure varies directly with the Kelvin temperature.
What is Charles' Law?
200
In an autoclave, a constant amount of steam is generated at a constant volume. Under 1.00 atm pressure the steam temperature is 100°C. What pressure setting should be used to obtain a 165°C steam temperature for the sterilization of surgical instruments?
What is 1.17 atm
200
A gas at 65ºC occupies 4.22 L. At what Celsius temperature will the volume be 3.87 L, assuming that the pressure is the same?
What is 37ºC? (charles' law)
200
Defined as the force per unit area on a surface.
What is pressure?
300
the process in which individual molecules flow through a hole without collisions between molecules.
What is Effusion?
300
This law states the pressure of a fixed mass of gas at a constant volume varies directly with the Kelvin temperature.
What is Gay-Lussac's Law
300
A sample of gas occupies 50.0L at 15.0C and 640.0mm Hg. What is the volume at STP?
What is 40.0 L
300
At 120.ºC, the pressure of a sample of nitrogen is 1.07 atm. What will the pressure be at 205ºC, assuming constant volume?
What is 1.30 atm? (gay- lussac's law)
300
The study of the composition, structure, and properties of matter and the changes it undergoes.
What is chemistry?
400
the temperature negative 273.15 degrees Celsius, given a value of zero in the kelvin scale.
What is absolute zero?
400
This law expresses the relationship between pressure, volume, and temperature of a fixed amount of gas.
What is Combined Gas Law?
400
A 28.02 g sample of nitrogen (N2) is sealed in a 6.00 L container and heated to a temperature of 327C. What is the pressure of the gas?
What is 830 kPa or 8.4 atm
400
Air contains oxygen, nitrogen, carbon dioxide, and trace amounts of other gases. What is the partial pressure of oxygen (PO2) at 101.3kPa of total pressure if it’s known that the partial pressures of nitrogen, carbon dioxide, and other gases are 79.1kPa, 0.040kPa, and 0.94kPa, respectively? What is the name of the gas law used for this?
What is 21.2 kPa? (dalton's law)
400
To compare volumes of gases , it is necessary to know the temperature and pressure at which the vollumes are measured. For purposes of comparison, scientists have agreed on conditions of exactly 1 atm pressure and 0ºC
What is standard temperature and pressure or STP?
500
the pressure of each gas in a mixture.
What is Partial Pressure?
500
This law states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases.
What is Dalton's law of Partial Pressure?
500
50.45 g of an unknown elemental gas is in an 55.0 L container at 23 C and has a pressure of 111.9 kPa. What is the element?
What is Neon?
500
The volume of a gas is 27.5 mL at 22.0ºC and .974 atm. What will the volume be at 15.0ºC and .993 atm?
What is 26.3 mL? (combined gas law)
500
Divers know that the pressure exerted by the water increases about 100 kPa with every 10.2 m of depth. This means that at 10.2 m below the surface, the pressure is 201 kPa; at 20.4 m, the pressure is 301 kPa; and so forth. Given that the volume of a balloon is 3.5 L at STP and that the temperature of the water remains the same, what is the volume 51 m below the water's surface?
What is .59 L? (boyle's law)