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    Chemistry worksheet
    Topic: Ideal Gas

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    Ideal Gas
    1

    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?

    (1) 0 K and 1.00 atm

    (2) 150. K and 0.50 atm

    (3) 273 K and 1.00 atm

    (4) 600. K and 0.50 atm

    2

    Under which conditions of temperature and pressure does a real gas behave most like an ideal gas?

    (1) low temperature and low pressure

    (2) low temperature and high pressure

    (3) high temperature and low pressure

    (4) high temperature and high pressure

    3

    A sample of hydrogen gas will behave most like an ideal gas under the conditions of

    (1) low pressure and low temperature

    (2) low pressure and high temperature

    (3) high pressure and low temperature

    (4) high pressure and high temperature

    4

    Compared to a sample of helium at STP, the same sample of helium at a higher temperature and a lower pressure

    (1) condenses to a liquid

    (2) is more soluble in water

    (3) forms diatomic molecules

    (4) behaves more like an ideal gas

    5

    Under which conditions of temperature and pressure does a real gas behave most like an ideal gas?

    (1) 37 K and 1 atm

    (2) 37 K and 8 atm

    (3) 347 K and 1 atm

    (4) 347 K and 8 atm

    6

    A real gas behaves most like an ideal gas at

    (1) low pressure and high temperature

    (2) low pressure and low temperature

    (3) high pressure and high temperature

    (4) high pressure and low temperature

    7

    At which temperature and pressure would a sample of helium behave most like an ideal gas?

    (1) 75 K and 500. kPa

    (2) 150. K and 500. kPa

    (3) 300. K and 50. kPa

    (4) 600. K and 50. kPa

    8

    At which temperature and pressure will a sample of neon gas behave most like an ideal gas?

    (1) 300. K and 2.0 atm

    (2) 300. K and 4.0 atm

    (3) 500. K and 2.0 atm

    (4) 500. K and 4.0 atm

    Base your answers to questions 9 on the information below and on your knowledge of chemistry.

    The diagram and data below represent a gas and the conditions of pressure, volume, and temperature of the gas in a rigid cylinder with a moveable piston.

    physical-behavior-of-matter, gas-lows fig: chem12017-exam_g15.png

    9

    State one change in temperature and one change in pressure that will cause the gas in the cylinder to behave more like an ideal gas.

    Allow 1 credit. Acceptable responses include, but are not limited to:

    • Temperature: higher/increase

    • Pressure: lower/decrease

    • Temperature: above 298 K

    • Pressure: below 1.0 atm

    Base your answers to questions 10 on the information below and on your knowledge of chemistry.

    In a laboratory activity, the volume of helium gas in a rigid cylinder with a movable piston is varied by changing the temperature of the gas. The activity is done at a constant pressure of 100. kPa. Data from the activity are plotted on the graph below.

    physical-behavior-of-matter, gas-lows fig: chem12019-exam_g16.png

    10

    State a change in pressure that will cause the helium in the cylinder to behave more like an ideal gas.

    Allow 1 credit. Acceptable responses include, but are not limited to:

    • lower the pressure

    • decrease pressure

    • any pressure below 100. kPa

    Base your answers to questions 11 on the information below and on your knowledge of chemistry.

    Cylinder A has a movable piston and contains hydrogen gas. An identical cylinder, B, contains methane gas. The diagram below represents these cylinders and the conditions of pressure, volume, and temperature of the gas in each cylinder.

    physical-behavior-of-matter, number-of-paritcles-and-valumes-of-gases fig: chem62013-exam_g14.png

    11

    State a change in temperature and a change in pressure that will cause the gas in cylinder A to behave more like an ideal gas.

    Allow 1 credit. Acceptable responses include, but are not limited to:

    • Temperature: above 293 K. Pressure: below 1.2 atm

    • Temperature: higher. Pressure: lower

    Based on Table G, determine the additional mass of NaNO3(s) that must be dissolved to saturate the solution at 23°C. [1] 57 State what happens to the boiling point and freezing point of the solution when the solution is diluted with an additional 100. grams of H2O((cid:2)). [1] Base your answers to questions 12 on the information below and on your knowledge of chemistry.

    A 200.-milliliter sample of CO2(g) is placed in a sealed, rigid cylinder with a movable piston at 296 K and 101.3 kPa.

    12

    State a change in temperature and a change in pressure of the CO2(g) that would cause it to behave more like an ideal gas.

    Allow 1 credit. Acceptable responses include, but are not limited to:

    • Temperature: increase. Pressure: decrease

    • Temperature: higher. Pressure: lower

    • Temperature: any temperature above 296 K. Pressure: any pressure lower than 101.3 kPa

    Base your answers to questions 13 on the information below and on your knowledge of chemistry.

    The diagram below represents a sealed, rigid cylinder with a movable piston containing helium gas at 296 K and 1.3 atm.

    physical-behavior-of-matter, gas-lows fig: chem82023-exam_g19.png

    13

    State one change in temperature and one change in pressure that will cause the gas in the cylinder to behave more like an ideal gas. [1]

    Temperature:

    Pressure:

    Allow 1 credit. Acceptable responses include, but are not limited to:

    • Temperature: higher. Pressure: lower

    • Temperature: any temperature above 296 K. Pressure: any pressure lower than 1.3 atm

    Base your answers to questions 14 on the information below and on your knowledge of chemistry.

    A sample of a gas in a sealed, rigid cylinder with a movable piston has a volume of 0.250 liter at STP.

    14

    State a change in pressure that will cause the gas in the cylinder to behave more like an ideal gas. [1]

    Allow 1 credit. Acceptable responses include, but are not limited to:

    • Decrease the pressure.

    • lower

    • any pressure less than 1.00 atm

    Base your answers to questions 15 on the information below and on your knowledge of chemistry.

    Cylinder A and cylinder B are sealed, rigid cylinders with movable pistons. Each cylinder contains 500. milliliters of a gas sample at 101.3 kPa and 298 K. Cylinder A contains H2(g) and cylinder B contains N2(g). The diagrams below represent these two cylinders.

    physical-behavior-of-matter, gas-lows, physical-behavior-of-matter, number-of-paritcles-and-valumes-of-gases fig: chem12020-exam_g12.png

    15

    State a change in temperature and a change in pressure that will cause the gas in cylinder A to behave more like an ideal gas. [1]

    Temperature:

    Pressure:

    Allow 1 credit. Acceptable responses include, but are not limited to:

    • Temperature: increase

    • Pressure: decrease

    • Temperature: above 25°C

    • Pressure: below 1.00 atm. Temperature: any temperature above 298 K. Pressure: any pressure below 101.3 kPa