Final answer:
Equation 1: H2O(s) > H2O(l) describes a physical phase change (melting) from solid to liquid water, while Equation 2: H2O(l) > H2(g) + O2(g) represents a chemical change where liquid water decomposes into hydrogen and oxygen gases.
Step-by-step explanation:
The equations represent two different physical and chemical changes happening to water. In equation 1: H2O(s) > H2O(l), the water is going through a phase change where it transitions from a solid state (s), or ice, to a liquid state (l), or water. This is an example of melting or fusion, which is a physical change because it doesn't alter the molecular structure of water.
In equation 2: H2O(l) > H2(g) + O2(g), the water is undergoing a chemical change or reaction. It starts as a liquid state (l) and decomposes into its individual gases, hydrogen (H2) and oxygen (O2). A chemical change is characterized by the formation of new substances, which is what's happening in this case with the formation of hydrogen and oxygen gases from water.
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