Question

Which of the statements are evidence that gases do not always behave ideally? it is impossible to compress a gas enough so that it takes up no volume. when two gases are mixed, they follow dalton's law of partial pressures. co2 gas becomes dry ice (solid co2) at 1 atm and –78.5∘c. at 4 k and 1 atm, helium is a liquid?

Answer 1

Step-by-step explanation:

"It is impossible to compress a gas enough so that it takes up no volume"

Reason: Real gases posses intermolecular forces, which allows them to deviate from showing properties of ideal gases, real gases have volumes of their own, but the molecules of ideal gases are assumed to have no volume.

Dalton's law of partial pressure is only applicable to ideal gases and not real gases.

Answer 2

A, C and D. Explanation: Ideal gas law states that the mass of the gas is negligible compared to the volume of the container (negating D), and there are no inter-particle attractions (A&C). So when the gas is not ideal, it will attract other molecules and form liquids and solids.