4. A 10.0 g piece of ice at 0 degree C is added to 20.0 g of water at 50.0 degree C in a Dewar Flask. For water delta fus H^phi = 5980. J/mol. The heat capacity of liquid water may be considered constant for this question and is 4.184 J/gK. Consider the Dewar flask to be perfectly insulating with a negligible heat capacity. A. How would you best define the system and surroundings for this problem? B. What is the final temperature of the water? C. How could this process be done reversibly? If it were done reversibly, what would the values of delta Ssys and delta Ssurr be? D. For the direct addition of ice to the warm water what are deltaS sys and delta Ssurr?