At which of the following temperatures and pressures would a real gas be most likely to deviate from ideal behavior?
Gasses deviate from ideal behavior at high pressures and low temperatures.
Typically, we can ignore the interactions between gas molecules and ignore the space gas molecules take up.
In a high pressure system (low volume container), the volume of the gases will no longer be negligible.
At low temperatures (lower velocity), gasses approach the condensation point and intermolecular forces play a larger role.