For this problem, you will analyze a hypothetical scenario regarding groundwater contamination with TCE and treatment.

a$.$ Assume that the local environment $($T $=20$C$)$ is in equilibrium, and that some TCE remains in the pure liquid phase. What is the equilibrium $[$TCE$]$ in the liquid phase.

b$.$ Assume that the air in the pore spaces of the soil just above the groundwater is in equilibrium with the water. Calculate the concentration of concentration of TCE in this air in mol$/$L$.$