Practice Quiz

Praxis II General Science

Category - Major Ideas

Start a Study Session Sign up for Question of the Day
Of the following gases, which is the most likely to be the closest to a true ideal gas? Note that a perfectly ideal gas does not exist, but many gases come close.
  1. Hydrogen gas at 0.1 atmospheres and 400 K.
  2. Chlorine gas at 10 atmospheres and 250 K.
  3. A mixture of water vapor and air at 1 atmosphere and 323 K.
  4. Air (a mixture of nitrogen, oxygen, and carbon dioxide) at 5 atmospheres and 273 K.
  5. All of the above are very nearly ideal gases.
Explanation
Answer: A - Hydrogen gas at 0.1 atmospheres and 400 K is the closest out of the listed gases to a real ideal gas. The ideal gas law assumes that the gas molecules have no interaction, which is not true in a real situation. However, at low pressures and high temperatures, this is very nearly true because the number of gas molecules is few and less likely to collide. Water vapor is a very non-ideal gas because water has a strong dipole moment, meaning it has strong polar interactions with nearby molecules.
Was this helpful? Upvote!
Login to contribute your own answer or details
Start a Study Session Sign up for Question of the Day

Top questions

Related questions

Most popular on PracticeQuiz