This is not a homework question. Just some basic logic. Suppose that we have two identical pieces of solid metal. One is heated to a temperature of 100 degrees Celsius and one is cooled to zero degrees Celsius. Now we put both of them in a perfectly isolated container with negigible heat capacity. At what temperature would both pieces end up with? Is this a first grade question and what is the correct answer? 50 degrees Celsius? I think not. Somehow, I believe the answer to be 53,8 degrees Celsius. Am I right?