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matt schwartz
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A QUESTION. Suppose I enclose water within a large noncombustible substance, say a block of concrete. The water is completely enclosed and sealed = no way for it to escape. Now, I heat the block. I get it very hot. At any temperature I can raise it to, will it still be just water at the ambient temperature? Suppose I could raise it to some enormous temperature, 10K, would it still be just...liquid water? If there was some extra room for the water to vaporize, would it then create steam at that temperature? I assume so! Is there any temperature I could raise it to so it would NOT be liquid water? What would that be?