In a 1985 paper in the Journal of Chemical Thermodynamics, the standard molar entropy of chalcopyrite, CuFeS₂, is given as 0.012 J mol^-1 K^-1 at 5 K. Use this value to estimate the number of microstates for one picogram (1 x 10^-12 g) of CuFeS₂ at 5 K and 1 bar. Report your answer in the manner described in Exercise 3.

Exercise 3

The standard molar entropy of H₂(g) is S° = 130.7 J mol^-1 K^-1 at 298 K. Use this value, together with Boltzmann’s equation, to determine the number of microstates, W, for one mole of H₂(g) at 298 K and 1 bar. Reflect on the magnitude of your calculated value by describing how to write the number in decimal form.