Honors Chemistry Test Review - Unit 9 - Gases

‭HONORS Chemistry Test Review‬ ‭Name:‬ ‭Unit 9 – GASES‬ ‭Period:‬ T‭ est reviews are‬‭always due the day‬‭before‬‭the test‬‭so any clarificat...

‭HONORS Chemistry Test Review‬ ‭Name:‬ ‭Unit 9 – GASES‬ ‭Period:‬ T‭ est reviews are‬‭always due the day‬‭before‬‭the test‬‭so any clarification on the material can be discussed.‬‭If the test review is turned in‬ ‭on time - the day before the test, at the beginning of class, then you are eligible for any extra credit questions given on the test. To‬ ‭receive credit for the test, the review MUST be turned in. It doesn’t make sense to review for an assessment after you have taken the‬ ‭test, so always do this before. Your review must be neat and organized.‬ ‭1.‬ ‭If the initial pressure of a system was 4.00 atm and the volume is halved and the temperature is tripled,‬ ‭what is the final pressure?‬ ‭2.‬ ‭What is the proper form of the combined gas law?‬ ‭3.‬ ‭What happens to the volume of a gas when you triple the number of moles of gas while keeping the‬ ‭temperature and pressure constant?‬ ‭4.‬ ‭Suppose you had a balloon containing 2.5 moles of helium at STP and a balloon containing 2.5 moles of‬ ‭ ydrogen at STP. What can you say about their volume, mass, number of moles, temperature, and‬ h ‭pressure?‬ ‭5.‬ ‭What is the final volume of a 30.0 L system that has the pressure halved? Doubled?‬ ‭6.‬ ‭Why does increasing the volume of a given amount of gas at constant temperature cause the pressure to‬ ‭decrease?‬ ‭7.‬ ‭List at least 3 changes that would cause an increase in the pressure of a gaseous system.‬ ‭List at least 3 changes that would NOT cause an increase.‬ ‭8.‬ ‭Under what conditions of temperature and pressure is the behavior of real gases most like that of ideal‬ ‭gases?‬ ‭9.‬ ‭If the number of gas particles is halved, what can you say about the volume if the temperature and pressure‬ ‭do not change?‬‭If the number of gas particles is halved,‬‭the volume of the gas will be‬ ‭halved‬‭given that the temperature and pressure do‬‭not change‬ ‭10.‬ ‭Explain how and why straws work.‬‭When you suck the air out of the straw, you decrease the‬ ‭pressure inside the straw, allowing the higher pressure on the rest of the surface to push the‬ ‭liquid up‬ ‭11.‬ ‭For all gas law calculations, the temperature must be in what units?‬ ‭12.‬ ‭List the statements of the Kinetic Molecular Theory.‬ ‭13.‬ ‭List at least 4 equivalent values for 1 atm of pressure.‬ ‭14.‬ ‭What is the mathematical equation for Boyle’s Law?‬ ‭15.‬ ‭What is the final volume of a balloon that was initially 450.00 mL at 35°C and was then heated to 75°C?‬ Charles' Law ‭16.‬ ‭17.‬ ‭Suppose a balloon was released from the ground and rose to such a height that both the atmospheric‬ ‭pressure and the temperature decreased, what can you say about the volume of the balloon?‬ ‭18.‬ ‭List 4 ways to write the ideal gas law. Hint, solve for T, solve for V, solve for P, etc.‬ ‭19.‬ ‭What is the pressure of a 7.00 L gas vessel that has 36.0 grams of argon at 30.0 °C?‬ ‭20.‬ ‭What is the final volume of a gas that initially occupies 5.60 L at 459 K and is subsequently heated to 674 K?‬ ‭21.‬ ‭What happens to the temperature of a gas when it is compressed if pressure remains constant?‬ ‭22.‬ ‭Explain why the pressure inside a container of gas increases if more gas is added to the container.‬ ‭23.‬ ‭What is the molecular weight of a gas if a 42.0 g sample has a pressure of 436 mm Hg at 30.0°C in a 4.00 L‬ ‭flask?‬ ‭24.‬ ‭As you decrease temperature, what happens to the average energy of the gas particles?‬ ‭25.‬ ‭State Boyle’s Law in words.‬ ‭26.‬ ‭How does the energy of a gas particle change when it collides with other gas particles on the container‬ ‭wall?‬ ‭27.‬ ‭What is the equivalent pressure of 0.879 atm in units of mm Hg?‬ ‭28.‬ ‭What is the mathematical equation for Charles’s Law? What does absolute zero refer to?‬‭Always‬ ‭remember that 0 on the Kelvin scale means‬‭-273‬‭or‬‭“Absolute Zero‬ ‭29.‬ ‭30.‬ ‭If the volume of a gas container at 45.0°C changes from 4.50 L to 555 mL (note, the different units), what‬ ‭will the final temperature be in °C?‬ ‭31.‬ ‭A certain volume of gas was confined in a rigid container. If the pressure of the gas sample in the container‬ ‭was tripled, what happened to the temperature?‬ ‭32.‬ ‭A sample of argon gas, initially at 27.0°C, 875 torr, and 3.00 L was heated to 68.0°C while the volume‬ ‭expanded to 5.24 L. What is the final pressure in atm? (Note the difference in pressure units)‬ ‭33.‬ ‭What is the temperature (°C) of 4.56 moles of gas stored in a 40.0 L container at 1229 mm Hg?‬ ‭34.‬ ‭The vapor pressure of water at 20.0°C is 17.5 mm Hg. If the pressure of a gas collected over water was‬ ‭measured to be 0.665 atm, what is the pressure of the pure gas?‬ ‭35.‬ ‭What is the change in temperature of a 4.60 L system when it is compressed to 3.20 L if the initial‬ ‭temperature was 305 K?‬ ‭36.‬ ‭The volume of a gas is reduced from 12 L to 1.5 L while the temperature is held constant. How does the gas‬ ‭pressure change?‬ ‭37.‬ ‭What can be said about the distance between gas particles as compared to their relative size?‬ ‭38.‬ ‭As we climb a mountain to a higher altitude, what kind of a pressure change do we experience?‬ ‭39.‬ ‭What can we say about the volume of one mole of Cl‬‭2‬ ‭gas at STP compared to the volume of one mole of Kr‬ ‭gas at STP?‬ ‭40.‬ ‭The initial volume of a gas cylinder is 450.0 mL. If the pressure of a gas inside the cylinder changes from‬ ‭940.5 mm Hg to 230.0 mm Hg, what is the final volume the gas occupies in Liters?‬ ‭41.‬ ‭A balloon originally had a volume of 0.852 L at 33.0°C and a pressure of 788 torr. To what temperature, in‬ ‭°C, must the balloon be cooled to reduce the volume to 378 mL if the pressure remained constant?‬ ‭42.‬ ‭What is the final volume, in L, of a 600.0 mL gas container that increased in temperature from 199 K to‬ ‭444 K while the pressure increased from 1.50 atm to 2.00 atm?‬ ‭43.‬ ‭A balloon contains 2000. L of gas, at 40.0°C and 102 kPa, rises to an altitude where the pressure is 40.5 kPa‬ ‭and the temperature is 10.0° C. What would be the volume of the balloon under these new conditions?‬ ‭44.‬ ‭The breathing mixture used by deep sea divers contains helium, oxygen, and carbon dioxide. What is the‬ ‭ artial pressure of helium at 101.0 kPa if the partial pressure of oxygen is 89.0 kPa and the partial pressure‬ p ‭of carbon dioxide is 0.5 kPa?‬ ‭45.‬ ‭Do gas particles act independently of each other? EXPLAIN!!‬ ‭46.‬ ‭A sealed bag of potato chips will expand when taken to a higher altitude. What gas law is this an example‬ ‭ f?‬‭Boyle’s Law‬‭his law states that as the pressure‬‭on a gas decreases, its volume increases, which‬ o ‭is why the air inside the bag expands as the atmospheric pressure drops at higher altitudes.‬ ‭47.‬ ‭If the number of gas particles is quadrupled, what will happen to the volume of the original container given‬ ‭that the temperature and pressure do not change?‬