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1 | |
Provided that the mass and temperature of an ideal gas are maintained constant, the volume of a gas is directly proportional to its absolute pressure. |
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| | A) | True |
| | B) | False |
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2 | |
If the mass and volume of a gas remain constant, doubling the pressure will also double the temperature. |
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| | A) | True |
| | B) | False |
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3 | |
The mass of a single molecule of a substance is known as its molecular mass. |
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| | A) | True |
| | B) | False |
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4 | |
At a temperature of 273 K and a pressure of 1 atm, 1 mol of any gas will occupy a volume of 22.4 L. |
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| | A) | True |
| | B) | False |
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5 | |
Only absolute temperatures and absolute pressures can be used in applying the general gas laws. |
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| | A) | True |
| | B) | False |
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6 | |
If the relative humidities inside and outside the house are the same, the dew points must also be the same. |
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| | A) | True |
| | B) | False |
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7 | |
The saturated vapor pressure for a substance is greater at higher temperatures. |
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| | A) | True |
| | B) | False |
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8 | |
All forms of vaporization are cooling processes. |
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| | A) | True |
| | B) | False |
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9 | |
It is possible for ice to be in thermal equilibrium with boiling
water. |
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| | A) | True |
| | B) | False |
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10 | |
The same mass of any ideal gas will occupy the same volume at standard temperature and pressure. |
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| | A) | True |
| | B) | False |
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11 | |
Boyle’s law states that, when other parameters are held constant, |
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| | A) | pressure varies directly with volume |
| | B) | pressure varies directly with temperature |
| | C) | pressure varies inversely with volume |
| | D) | volume varies directly with temperature |
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12 | |
If the mass and pressure of a gas are held constant while its volume doubles, the temperature is changed by a factor of |
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| | A) | ¼ |
| | B) | ½ |
| | C) | 2 |
| | D) | 4 |
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13 | |
The amount of water contained in the air of a given room is described most accurately by the |
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| | A) | absolute humidity |
| | B) | relative humidity |
| | C) | vapor pressure |
| | D) | dew point |
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14 | |
It is possible for a substance to coexist in all three of its phases in equilibrium when the substance is at its |
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| | A) | critical pressure |
| | B) | critical temperature |
| | C) | triple point |
| | D) | dew point |
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15 | |
At a temperature of 273 K and a pressure of 1 atm, 1 mol of any gas will occupy a volume |
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| | A) | of 1 L |
| | B) | of 22.4 m³ |
| | C) | equal to its molecular mass |
| | D) | of 22.4 L |
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16 | |
A weather balloon is filled to a volume of 400 L at 0°C. What will its volume be at 100°C if the pressure is constant? |
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| | A) | 147 L |
| | B) | 255 L |
| | C) | 293 L |
| | D) | 547 L |
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17 | |
The molecular mass of oxygen is 32 g/mol. How many molecules are present in 64 g of oxygen? Avogadro’s number is 6.02 X 1023. |
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| | A) | 3.012 X 1023 molecules |
| | B) | 6.02 X 1023 molecules |
| | C) | 12.04 X 1023 molecules |
| | D) | 24.092 X 1023 molecules |
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18 | |
How many grams of CO2 (M = 44 g) will occupy a volume of 200 L at a pressure of 3 atm and an absolute temperature of 300 K? |
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| | A) | 10,719 g |
| | B) | 512 g |
| | C) | 107 g |
| | D) | 244 g |
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19 | |
When the air temperature is 26°C and the dew point is 10°C, the relative humidity is |
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| | A) | 32 percent |
| | B) | 36.5 percent |
| | C) | 43.2 percent |
| | D) | 54.1 percent |
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20 | |
A 5000-cm³ container holds 6 g of gas under a pressure of 2 atm and a temperature of 20°C. When 10 g of the same gas fills a 2500-cm³ container, the temperature rises to 30°C. The new pressure is |
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| | A) | 2.71 atm |
| | B) | 3.3 atm |
| | C) | 6.89 atm |
| | D) | 9.31 atm |
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21 | |
Provided that the and of a sample of gas are maintained constant, the of the gas varies inversely with its absolute pressure. This is known as law. |
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22 | |
In the ideal gas law, the ratio of to is always equal to constant R, known as the constant. |
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23 | |
The temperature above which a gas will not liquefy, regardless of the pressure applied, is called the . |
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24 | |
Three types of vaporization are , , and . |
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25 | |
The temperature to which air must be cooled at constant pressure to produce saturation is called the . |
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26 | |
humidity represents the quantity of water vapor per unit volume. humidity, however, is a percentage based on the ratio of to . |
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27 | |
A is that quantity of a substance that contains the same number of particles as there are atoms in 12 g of carbon 12. |
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28 | |
If the and of a gas are held constant, Charles’s law states that the of a gas is directly proportional to its . |
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29 | |
A mole of any gas contains molecules. This number is referred to as . |
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30 | |
The units for the constant R in the ideal gas law are , as determined from the equation. |
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