Question 2 Choose the correct answer from the given choices (20 pts) (1) (a) (b) (c) (2) (3) A system comprising a single phase is called a closed system homogeneous system isolated system (4) The value of one bar (in SI units) is equal to (a) (b) (c) (d) none of the above Which of the following is correct? termed as (a) Absolute pressure gauge pressure-atmospheric pressure. (b) Gauge pressure absolute pressure + atmospheric pressure (c) Atmospheric pressure = absolute pressure + gauge pressure (d) Absolute pressure = gauge pressure + atmospheric pressure The main cause of the irreversibility is (a) mechanical and fluid friction (b) unrestricted expansion (c) heat transfer with a finite temperature difference (d) all of the above (5) Which of the following is not a property of the system (a) Temperature (b) Pressure (c) Sp. volume (d) Heat (e) none of the above (6) Which one of the following statements is true? (a) Work is not a system property, but heat is a system property. (b) (c) Energy, as well as mass, can flow across the surfaces of a control volume (d) A compressed liquid (characterized by low temperature and low specific volume) is about to vaporize. Which one of the following statements is true? (a) All the reversible engines have the same efficiency. (b) All the reversible and irreversible engines have the same efficiency. (c) Irreversible engines have maximum efficiency (d) All engines are designed as reversible in order to obtain maximum efficiency.