Gas Team Review Game
?1 List all 5 parts of the Kinetic Molecular Theory. List all 5 parts of the Kinetic Molecular Theory.
Answer 1) Gases consist of large numbers of tiny particles that are far apart relative to their size. 2) Collisions are elastic. 3) Gas particles are in continuous, rapid, random motion. 4) There are no forces of attraction or repulsion between gas particles. 5) The average kinetic energy depends on temperature of the gas.
?2 A spontaneous mixing of two gases caused by random motion is _____________.
Answer Diffusion
?3 Give an example of diffusion
Answers will vary
?4 _________ is a process by which gas particles pass through a tiny opening.
Effusion
?5 Give an example of effusion
Answers will vary.
?6 What does STP stand for?
Standard Temperature and Pressure
?7 What is standard temperature in Celsius and Kelvin?
O°C and 273K
?8 What is standard pressure in atm?
1 atm
?9 Convert °C to K.
263.0K (Addition rule for sig figs)
?10 Convert 125mmHg to atm
0.164atm
?11 According to the KMT, what will happen when two gas particles collide?
They will have an elastic collision and their energy will be conserved (no loss or gain of energy).
?12 Draw the 3 graphs relating temperature, pressure, and volume.
PT-directPV-indirectTV-direct
?13 You are planning an experiment that requires mol of nitrogen monoxide gas. What volume would you need at STP?
1.30L
?14 A(n) _________ gas is an imaginary gas that perfectly fits all the assumptions of the KMT.
Ideal
?15 A(n) ______ gas is a gas that does not behave completely according to the assumptions of the KMT.
Real
?16 A gas has a pressure of 1.26atm and occupies a volume of 7.40L. If the gas is compressed to a volume of 2.93L, what will its pressure be, assuming constant temperature?
3.18atm
?17 A sample of carbon dioxide gas occupies 638mL at 0.893atm and 12°C. What will the pressure be at a volume of 881mL and a temperature of 18°C?
0.660atm
?18 A balloon filled with oxygen gas occupies a volume of 5.5L at 25°C. What volume will the gas occupy of 100.°C?
6.9L
?19 A 0.700L gas sample at STP is compressed to a volume of 200.mL, and the new temperature is increased to 30.0°C. What is the new pressure of the gas in Pa?
3.94x10 5 Pa
?20 What is the density of chlorine gas at STP?
3.1g/L
?21 Which law states that the total pressure exerted on the walls of a container equals the sum of the partial pressures of each gas.
Dalton’s Law of Partial Pressures
?22 A 2.07L cylinder contains 2.88mol of helium gas at 22°C. What is the pressure in atmospheres of the gas in the cylinder?
33.7atm
?23 A weather balloon at Earth’s surface has a volume of 4.00L at 304K and 755mmHg. If the balloon is released and the volume reaches 4.08L at 728mmHg, what is the temperature?
299K
?24 To what temperature (in Celsius) must a sample of nitrogen at 27°C and atm be taken so that its pressure becomes 1.125atm at constant volume?
270.°C (540.K)
?25 A gas sample of 83°C occupies a volume of 1400m 3. At what temperature will it occupy at 1200m 3 ?
310K (have to round to 2 sig figs)
?26 What is the pressure of a mixture of helium, nitrogen, and oxygen if their partial pressures are 600.mmHg, 150.mmHg, and 102mmHg?
852mmHg
?29 How many liters of chlorine at STP will react with 35LO 2 at STP? Use the following reaction. 2Cl 2 +7O 2 2Cl 2 O 7
10.LCl 2
?30 What would the units for R be if P is in pascals, T is in kelvins, V is in liters, and n is in moles?
LPa/(Kmol)
?31 Nitric acid can be produced by the reaction of gaseous nitrogen dioxide with water. 3NO 2 +HOH 2HNO 3 +NO If 708L of NO 2 gas react with water, what volume of NO gas will be produced? Assume the gases are measured under the same conditions.
236L
?32 What volume of oxygen gas in liters can be collected at 0.987atm pressure and 25.0°C when 30.6g of KClO 3 decompose by heating, according to the following equation? 2KClO 3 2KCl+3O 2
9.28L
Bonus A chemist determines the mass of a sample of gas to be 3.17g. Its volume is 942mL at a temperature of 14°C and a pressure of 1.09atm. What is the molar mass of the gas?
72.7g/mol