10.0 mol of argon (monoatomic) gas is introduced to an empty 50-cm^3 container at 20° C. The gas than undergoes an isobaric heating to a temperature of 300° C.  a) what is the pressure at which this process happens?  b) what is the final volume of gas?  c) show this process of a PV diagram. Make sure you include units and properly label axes.  d) what is the amount of work done during this process? Is this work done on the gas or by the gas? e) how much he is involved in this process? is the heat going in or out of the 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.