Each gas sample has the same A) density B) mass C) number of molecules D) number of atoms
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1 1. A real gas behaves most like an ideal gas at A) low pressure and high temperature B) average potential energy of its particles C) ionization energy of its particles D) activation energy of its particles 2. According to kinetic molecular theory, which statement describes one characteristic of an ideal gas system? A) The distance between gas is smaller than the diameter of one gas molecule. B) The attractive force between two gas is strong. C) The energy of the system decreases as gas collide. D) The straight-line motion of the gas is constant and random. 3. Which graph shows the relationship between pressure and Kelvin temperature for an ideal gas at constant volume? 4. Compared to a sample of helium at STP, the same sample of helium at a higher temperature and a lower pressure A) condenses to a liquid B) is more soluble in water C) forms diatomic D) behaves more like an ideal gas 5. Which statement describes particles of an ideal gas, based on the kinetic molecular theory? A) Gas particles are separated by distances smaller than the size of the gas particles. B) Gas particles do not transfer energy to each other when they collide. C) Gas particles have no attractive forces between them. D) Gas particles move in predictable, circular motion.
2 6. A sample of hydrogen gas will behave most like an ideal gas under the conditions of A) low pressure and low temperature B) low pressure and high temperature C) high pressure and low temperature D) high pressure and high temperature 7. According to the kinetic molecular theory for an ideal gas, all gas particles A) are in random, constant, straight-line motion B) are separated by very small distances relative to their sizes C) have strong intermolecular forces D) have collisions that decrease the total energy of the system 8. Under which conditions of temperature and pressure does a real gas behave most like an ideal gas? A) low temperature and low pressure B) low temperature and high pressure C) high temperature and low pressure D) high temperature and high pressure 9. A sample of chlorine gas is at 300. K and 1.00 atmosphere. At which temperature and pressure would the sample behave more like an ideal gas? A) 0 K and 1.00 atm B) 150. K and 0.50 atm C) 273 K and 1.00 atm D) 600. K and 0.50 atm 10. According to the kinetic molecular theory, the particles of an ideal gas A) have no potential energy B) have strong intermolecular forces C) are arranged in a regular, repeated geometric pattern D) are separated by great distances, compared to their size 11. A real gas behaves least like an ideal gas under the conditions of A) low temperature and low pressure B) low temperature and high pressure C) high temperature and low pressure D) high temperature and high pressure 12. Under which conditions of temperature and pressure would a 1-liter sample of a real gas behave most like an ideal gas? A) l00 K and 0.l atm B) 100 K and 10 atm C) 500 K and 0.1 atm D) 500 K and 10 atm 13. Under which conditions of temperature and pressure does oxygen gas behave least like an ideal gas? A) low temperature and low pressure B) low temperature and high pressure C) high temperature and low pressure D) high temperature and high pressure 14. At the same temperature and pressure, 1.0 liter of CO(g) and 1.0 liter of CO2(g) have A) equal masses and the same number of B) different masses and a different number of C) equal volumes and the same number of D) different volumes and a different number of 15. A closed container holds 3.0 moles of CO2 gas at STP. What is the total number of moles of Ne(g) that can be placed in a container of the same size at STP? A) 1.0 mole B) 1.5 moles C) 3.0 moles D) 0.0 moles 16. Each stoppered flask below contains 2 liters of a gas at STP. Each gas sample has the same A) density B) mass C) number of D) number of atoms
3 17. At STP, 1 liter of O2 would have the same number of as A) 1 liter of H2 B) 2 liters of CO C) 3 liters of CO2 D) 0.5 liter of Ne 18. At STP, 1 liter of H2(g) and 1 liter of He(g) have the same A) mass B) density C) number of atoms D) number of 19. A 10.-liter flask at a given temperature and pressure contains of hydrogen gas. Under the same conditions of temperature and pressure, how many would a 10.-liter flask of nitrogen gas contain? A) B) C) D) The pressure on a 900-milliliter sample of CO2(g) at constant temperature is increased from 60 kpa to 180 kpa. What is the new volume of the gas? A) 100 ml B) 300 ml C) 400 ml D) 600 ml 21. A rigid cylinder with a movable piston contains a sample of gas. At 300. K, this sample has a pressure of 240. kilopascals and a volume of 70.0 milliliters. What is the volume of this sample when the temperature is changed to 150. K and the pressure is changed to 160. kilopascals? A) 35.0 ml B) 52.5 ml C) 70.0 ml D) 105 ml 22. Which set of values represents standard pressure and standard temperature? A) 1 atm and K B) 1 kpa and 273 K C) kpa and 0 C D) atm and 273 C 23. Which temperature change would cause a sample of an ideal gas to double in volume while the pressure is held constant? A) from 400. K to 200. K B) from 200. K to 400. K C) from 400. C to 200. C D) from 200. C to 400. C 24. A sample of gas confined in a cylinder with a movable piston is kept at constant pressure. The volume of the gas doubles when the temperature of the gas is changed from A) 400. K to 200. K B) 200. K to 400. K C) 400. C to 200. C D) 200. C to 400. C 25. Which graph represents the relationship between pressure and volume for a sample of an ideal gas at constant temperature? A) B) C) D)
4 26. Which graph best represents the pressure-volume relationship for an ideal gas at constant temperature? 29. Which graph best shows the relationship between the pressure of a gas and its average kinetic energy at constant volume? A) 27. A gas occupies a volume of 40.0 milliliters at 20 C. If the volume is increased to 80.0 milliliters at constant pressure, the resulting temperature will be equal to B) C) 28. Which graph shows the pressure-temperature relationship expected for an ideal gas? D) 30. As the temperature of a given sample of a gas decreases at constant pressure, the volume of the gas A) decreases B) increases C) remains the same 31. Standard temperature and pressure are A) 0 C and 1.00 kpa B) 0 C and kpa C) 273 C and 1.00 kpa D) 273 C and kpa
5 32. A cylinder with a tightly fitted piston is shown in the diagram below. As the piston moves downward, the number of of air in the cylinder A) decreases B) increases C) remains the same 33. Standard temperature and a pressure of 0.5 atmosphere are equal to A) 0 C and 51.6 kpa B) 32 C and 51.6 kpa C) 0 C and kpa D) 32 C and kpa 34. If 60. liters of hydrogen gas at 546 K is cooled to 273 K at constant pressure, the new volume of the gas will be A) 120 L B) 20. L C) 30. L D) 40. L 35. The graph below represents the relationship between pressure and volume of a given mass of a gas at constant temperature. 36. What volume will a 300.-milliliter sample of a gas at STP occupy when the pressure is doubled at constant temperature? A) 150. ml B) 450. ml C) 300. ml D) 600. ml 37. A gas sample has a volume of 25.0 milliliters at a pressure of 1.00 atmosphere. If the volume increases to 50.0 milliliters and the temperature remains constant, the new pressure will be A) 1.00 atm B) 2.00 atm C) atm D) atm 38. A sample of a gas has a volume of 40. milliliters at 76.0 kpa. What will be the new volume of the gas if the pressure is increased to 80.0 kpa, temperature remaining constant? A) 80 ml B) 42 ml C) 38 ml D) 20 ml 39. Which graph represents the relationship between volume and Kelvin temperature for an ideal gas at constant pressure? The product of pressure and volume is constant. According to the graph, what is the product in atmml? A) 20. B) 40. C) 60. D) If 4.00 moles of oxygen gas, 3.00 moles of hydrogen gas, and 1.00 mole of nitrogen gas are combined in a closed container at standard pressure, what is the partial pressure exerted by the hydrogen gas? A) 1.00 atm B) atm C) 3.00 atm D) atm
6 41. A mixture of gases has a total pressure of 200 kpa. The mixture contains 8 moles of nitrogen gas and 2 moles of oxygen gas. What pressure is exerted by the oxygen gas? A) 20 kpa B) 40 kpa C) 200 kpa D) 400 kpa 42. What is the pressure of a mixture of CO2, SO2, and H2O gases, if each gas has a partial pressure of 25 kpa? A) 25 kpa B) 50 kpa C) 75 kpa D) 101 kpa 43. Gases in the amounts shown in the table below were added to an empty 22.4 liter container at 0 C. How much argon gas should be added to the container at 0 C to produce a total pressure of 1.00 atmosphere? A) 1.12 moles B) 2.24 moles C) mole D) mole 44. A sealed container has 1 mole of helium and 2 moles of nitrogen at 30ºC. When the total pressure of the mixture is 60 kpa, what is the partial pressure of the nitrogen? A) 10 kpa B) 20 kpa C) 40 kpa D) 60 kpa 45. At STP, which gas diffuses at the faster rate? A) H2 B) N2 C) CO2 D) NH3 46. Which gas diffuses most rapidly at STP? A) Ne B) Ar C) Cl2 D) F2 47. The table below lists four gases and their molecular mass. Which gas diffuses at the slowest rate at STP? A) A B) B C) C D) D 48. At standard pressure, a certain compound has a low boiling point and is insoluble in water. At STP, this compound most likely exists as A) ionic crystals B) metallic crystals C) nonpolar D) polar
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