which of the following statements holds true? what is the answer a. temperature is an extensive property. b. 1N equals 1 kgm/s^2 and 1 lbf is equal to lb-ft/s^2 c. temperature is the property that is the same for each  of two systems when they are in thermal equilibrium d. the Rankine degree is a smaller temperature unit than Kelvin degree

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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.