Which of the following is most likely to deviate from ideal ga7 behavior?

(A)He
(B)Ar
(c) Cl2
(d) CCl2F2

I would think D would be the most pronounced. The "volume" correction would be the most for it.

To determine which of the given gases is most likely to deviate from ideal behavior, we need to consider the factors that contribute to deviations from ideal gas behavior.

The ideal gas law assumes that gas molecules have no volume and do not interact with each other. However, in real gases, there are deviations from this behavior due to factors such as intermolecular forces and the finite size of gas molecules.

One factor that can cause deviations from ideal behavior is intermolecular forces. Gases with strong intermolecular forces tend to deviate more from ideal behavior. This is because these forces cause the gas molecules to attract each other, which reduces the overall gas volume and increases the pressure.

Another factor that can contribute to deviations from ideality is the size of gas molecules. Larger gas molecules have a higher chance of experiencing intermolecular interactions and occupying a larger volume of space than predicted by the ideal gas law.

Based on these factors, we can evaluate the given options:

(A) He (Helium) - Helium is a noble gas that consists of single atoms. Noble gases have weak intermolecular forces due to their stable electron configuration. Additionally, helium atoms are very small. Both of these factors make helium a gas that closely follows ideal gas behavior. Therefore, it is less likely to deviate from ideal behavior compared to the other options.

(B) Ar (Argon) - Argon is another noble gas, similar to helium. It also consists of single atoms and has weak intermolecular forces. While argon atoms have a larger size compared to helium, they are still relatively small. Argon is also unlikely to deviate significantly from ideal behavior.

(C) Cl2 (Chlorine) - Chlorine is a diatomic gas consisting of chlorine molecules. The presence of covalent bonds in the molecule gives rise to stronger intermolecular forces compared to noble gases. The chlorine molecule is larger and more polarizable than helium or argon, which indicates a higher likelihood of deviations from ideal gas behavior.

(D) CCl2F2 (Dichlorodifluoromethane) - This compound is a larger molecule compared to the other options, with chlorine and fluorine atoms bonded to a central carbon atom. The presence of multiple atoms and polar covalent bonds in the molecule leads to stronger intermolecular forces. Additionally, the size of the molecule further increases the chances of deviations from ideal behavior.

Thus, based on the factors mentioned, options (C) Cl2 and (D) CCl2F2 are more likely to deviate from ideal gas behavior compared to options (A) He and (B) Ar. Among these two, (D) CCl2F2, being a larger and more complex molecule, is more likely to deviate from ideal behavior compared to (C) Cl2.