a) One mole of ice is warmed from 220 K to 300 K at constant pressure of 1 bar. Find the enthalpy change (delta H) for this process. b) If we assume that the volume of the ice/water does not change significantly during the process in part a, what is the energy change (delta U)? c) In fact, when the ice melts the density changes from 0.9167 g/cm^3 to 1.000 g/cm^3. If we assume that the volume change is due entirely to the density change (that is, neglect thermal expansion of the ice/water), what is the difference between the enthalpy change and the energy change during the process? Is this a significant difference, compared to the total energy change?