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.
20. According to Figure 1, as pressure increases from 1 atm to 50 atm at 0℃, the compressibility factor of an ideal gas:
Your Answer is
Correct Answer is J
Explanation
Looking at figure 1, we can find that as the abscissa increases, the ordinate of ideal gas remains unchanged