0.100 kg of water at 10?C is added to 0.300 kg of soup at 50?C. Assume complete transfer of thermal energy from soup to the water, with no transfer of energy to the environment. Specific heat of water is 4180 J/kg??C. The soup has the same specific heat as water.
Estimate the entropy change of this water-soup system during the process using the actual temperatures to determine the heat transferred and the average temperatures to determine the entropy change.