Some very hot rocks have a temperature of #320 ^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?
1 Answer
Mar 3, 2018
About 720 kg
Explanation:
Let us first calculate how much heat would be required to completely vaporize the water
So
So now for the rocks, the heat lost should be:
Assumption made was: There was no more temperature rise after the water was completely vaporized, so that the final temperature of the system was 100 °C or 373 K