Question

Henry’s Law for the solubility of a gas in particular solvent is expressed as C = kHP where kH is the Henry’s Law constant for a particular solute-solvent pair, with units of M/atm.

Consider the dissolution process of a generic gas into water as follows:

                                                A(g) <-> A (q)

1. Write an equilibrium expression for this dissolution.

2. Describe a change that pushes the system out of equilibrium that could lead to the dissolution of more gas particles to restore equilibrium.

3. Between H₂, HF, and HI, which do you think would have the largest Henry’s Law constant and why?

4. Gases dissolve more readily in cold liquids than in hot liquids.  The equilibrium constant increases and the temperature decreases.  Is the dissolution of gas into a liquid endo or exothermic?  What is the sign of ∆H_solnfor this process?

5. Explain the sign you indicated above. (What physical attributes cause this.)

Answer 1

answered by: anonymous