Multiple Choice
Using the ideal gas law, how many moles of gas are present in a 20 L container at a pressure of 2 atm and a temperature of 400 K? (Use R = 0.0821 L·atm·mol^{-1}·K^{-1})
19
views
7. Gases
The Ideal Gas Law
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following is the main cause of non-ideality in real gases?
A
Negligible volume of gas particles
B
Constant temperature and pressure
C
Perfectly elastic collisions
D
Intermolecular forces between gas particles
Verified step by step guidance1
Understand that the ideal gas law assumes gas particles have negligible volume and no intermolecular forces between them.
Recognize that 'negligible volume of gas particles' and 'perfectly elastic collisions' are assumptions that support ideal gas behavior, not causes of non-ideality.
Recall that real gases deviate from ideal behavior mainly because gas particles do occupy some volume and experience forces of attraction or repulsion.
Identify that the main cause of non-ideality in real gases is the presence of intermolecular forces between gas particles, which affect how they move and interact.
Therefore, the correct answer is that intermolecular forces between gas particles cause deviations from ideal gas behavior.
Related Videos
Related Practice
The Ideal Gas Law practice set
Problem sets built by lead tutorsExpert video explanations