I need help on this question: This question requires the use of Thermodynamics Property Tables. In addition, for steam, the specific ideal gas constant = 461.5 J/kg K. Q. A closed system is comprised of 10 kg pure water substance initally at a temperature of 400 oC and a pressure of 8.5 MPa (State 1). a) For state 1, show that the system is in the superheated vapour phase.  b) Evaluate the specific volume of the steam in state 1 using the thermodynamic property tables supplied and compare it to the value obtained assuming the steam behaves as an ideal gas. Which value woyld you have most confidence in (give reasons for your choice).

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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.