A spherical balloon initially having a diameter of 5 in is inflated so that its volume will be twice compared to its original size. At constant pressure, what will be the final temperature of the air in the balloon when T1 = 118°F. a. 1220 0F b. 680 0F c. 660 0F d. 696 0F

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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.