Some very hot rocks have a temperature of #240 ^o C# and a specific heat of #240 J/(Kg*K)#. The rocks are bathed in #16 L# of water at #70 ^oC#. If the heat of the rocks completely vaporizes the water, what is the minimum combined mass of the rocks?
You need the heat of vaporization to answer the question.
The heat of vaporization for water is
Then, let's solve the problem with the formula
The heat energy must follow the law of energy conservation law.
Therefore, the mass of rocks is