1. The problem statement, all variables and given/known data 1 Kg of water is heated at 0 degree C is brought into contact with a large heat reservoir at 100 degrees C. When the water has reached 100 degrees C, what has been the change in entropy of the water? And of the heat reservoir ? what has been the change in the entire system consisting of both water and the heat reservoir? 2. Relevant equations [tex]\Delta[/tex]Sw = mcln(Tf/Ti) where m = mass of water c = specific heat capacity of water ( 4186 J/K) Tf = final common temperature of water and the reservoir Ti = initial temperature of water (and also reservoir for part b of the question) 3. The attempt at a solution The application of formula above gave me answer for entropy change in water but not for reservoir and the whole system. Some help anticipated.