Passage IV
An ideal gas is a hypothetical gas that behaves exactly as predicted by the ideal gas law. Depending on the conditions, an ideal gas may or may not be a good model for a real gas. The compressibility factor (z) is a value that quantifies the deviation of a gas from ideal behavior. Figure 1 shows, for an ideal gas and for 5 real gases, how z varies with pressure (in atmospheres, atm) at 0 ℃. Table 1 shows how the volume of 1 mole (6 × 1023 atoms or molecules) of gas varies with pressure for an ideal gas, for 3 of those 5 real gases, and for air.
19. Based on Table 1, at 0℃ and 15 atm, the volume of 1 mole of air will most likely be closest to which of the following?
Your Answer is
Correct Answer is C
Explanation
Looking at table 1, when the pressure is 10 atm and 20 atm, the corresponding air volumes are 2216 and 1096 respectively, so the air volume of 15 atm in the question must be between 1096-2216