Complete each of the following statements with a number. Assume that the temperature is 25°C (298 K).

(a) Two reactions have equilibrium constants that differ by a factor of 10. Their standard free energies differ by _______________ kJ mol^–1.

(b) For every 1 kJ mol^–1 in standard free energy that two reactions differ, their equilibrium constants differ by a factor of _______________ .