A two phase liquid - vapor mixture of refridgerant a2 is Contained in a ciosed tank at 10 bar. The quality is le0% and the mass of Saturated liquid is 25 kg. Calculate the volume of Saturated vapor in m. use 5 sjgnifigant figures. 1.

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Q: 6. Draw P-T diagram for pure substance showing triple point.

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Q: Water with mass of 2 kg (initial temperature of water is 10-degree C) and ice with mass of 6 kg…

A: Givenmw=2kgTw=10oCmice=6kgTice=-10oCCwater=4200 J/kgKCice=2100 J/kgKLf=3.34×105 J/kg

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.