An ice pop mold is filled with a hot (80°C) mixture of jelly and fruit juice, and placed in a -20 °C freezer. The freezer is then unplugged. After 12 hours, a tasty frozen ice pop is formed. This process can be described as composed of three different changes: the liquid mixture cooling down, the mixture freezing, and the frozen mixture cooling down. Choose the mixture and freezer as your system. Draw an Energy diagram, label it, identify the parameters that indicate change, and the initial and final states of the evelle yriw niclox32 system.

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Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.