Question

QUESTION 1 [TOTAL MARKS: 25] Q 1(a) [5 Marks] i. What is the State postulate? [2 marks] ii. Using a sketch, briefly explain the difference(s) between a Closed System and an Isolated system. [3 Marks] Q 1(b) [20 Marks] Table 1 contains property information. The working fluid is water. Complete the table. You must show all calculations and/or explain how you determined your values, where applicable. [15] Plot the values on a P-v diagram. You should identify the phases for each row in Table 1, and include a sketch of any relevant isothermals. [5 Marks] Superheat v (m3/kg) u (kJ/kg Table 1: Property data for water P (bar) T (°C) X 40 130 10 20 h (kJ/kg) 1087 2200 0.8 3193 [End of Question 11

Answer 1

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