rate of change of entropy

1. When 0.5 J of heat passes between two large bodies in contact at temperatures of 70 ?C and 25 ?C, what is the change of entropy? If this occurs in 0.23 s, what is the rate of change of entropy di S/dt?
2. What is the entropy of 1.00 L of N2 (g) at T = 350.0 K and p = 20.25 atm given that the standard (p = 1.00 bar, T = 298.15 K) molar entropy S0m = 191.6 J K-1 mol-1? (Calculate the molar amount of N2 using the ideal gas equation.)