Problem: Classify the following phase changes by the signs of the system's ΔH and ΔS.solid to liquid                gas to solidliquid to gas                  solid to gasliquid to solid                gas to liquid

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Classify the following phase changes by the signs of the system's ΔH and ΔS.

solid to liquid                gas to solid

liquid to gas                  solid to gas

liquid to solid                gas to liquid

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Based on our data, we think this problem is relevant for Professor Duis' class at NAU.