1) An ice cube of mass m at 0 ?C is placed in a large 20...

1) An ice cube of mass m at 0 ?C is placed in a large 20 ?C room. Heat flows (from the room to the ice cube) such that the ice cube melts and the liquid water warms to 20 ?C. The room is so large that its temperature remains nearly 20 ?C at all times. Calculate the change in entropy for the (water + room) system due to this process. Assume that m is in kg.

2) A mass m of liquid water at 20 ?C is placed in a large 20 ?C room. Heat flows (from the water to the room) such that the liquid water cools to 0 ?C and then freezes into a 0 ?C ice cube. The room is so large that its temperature remains 20 ?C at all times. Calculate the change in entropy for the (water + room) system due to this process. Assume that m is in kg.

Express your answers in terms of m only.

Expert Solution

genius_generous answered 3 years ago

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