Deduce for the case of a perfect gas the relationship between the gas constant and the specific heats at constant pressure and at constant volume. The specific heat at constant pressure (cp) and the gas constant (R) of a perfect gas are 1.033 kJ/kg K and 108.2 J/kg K respectively. Find the ratio of specific heat at constant pressure to that at constant volume.

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A: Given, Initial volume, V1=0.45 m3 Final volume, V2=1.4 m3 Initial pressure, P1=85 kPa=85000 Pa

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A: Consider the solution solution below.

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A:

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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.