As part of the process of glycogen breakdown and utilization in muscles, glucose 1-phosphate is converted to glucose 6-phosphate (that is, the phosphate group on a glucose molecule moves from the carbon 1 atom to the carbon 6 atom) as a result of the action of the enzyme phosphoglumutase. An in vitro analysis shows that at 25°C and a pH of 7.0 adding the enzyme to a solution containing 0.020 M glucose 1-phosphate reduces its concentration to 0.001 M. Determine the apparent equilibrium constant for this reaction, and the actual Gibbs energy change at the reaction conditions.