The problem involves calculating the change in entropy of a system consisting of an ice cube and a lake as they reach thermal equilibrium. The specific heat of the ice is provided, and the temperatures of both the ice cube and the lake are specified.
The discussion is ongoing, with participants attempting to outline the steps needed to calculate the change in entropy. Some have suggested starting with the expression for the change in entropy and exploring the heat flow involved, while others are still grappling with the basic concepts.
There is a hint provided regarding the potential impact of the ice cube on the lake's temperature, which participants are considering in their discussions. The specific heat value is also noted as a key piece of information for the calculations.
Start by giving us the expression for the change in entropy dS due to an infinitessimal heat flow dQ.kukulalalu89 said:A 11 g ice cube at -20°C is placed in a lake whose temperature is 13°C. Calculate the change in entropy of the cube-lake system as the ice-cube comes into thermal equilibrium with the lake. The specific heat of ice is 2220 J/kg*K. (Hint: Will the ice cube affect the temperature of the lake?)