1. Please circle item(s) which is (are) intensive properties:
A) Pressure
B) The specific internal energy (kJ/kg) of water contained in a hot tank;
C) Total internal energy (kJ) of water contained in a tank;
D) Quality x of the saturated liquid-vapor mixture contained in a tank;
E) The density of water contained in a tank;
2. Please circle the item(s) which can be considered as pure substance in Thermodynamics:
A) Pure liquid water;
B) Mixture of liquid water and ice;
C) Air (Mixture of N2 and O2) at room temperature and atmosphere pressure;
D) Mixture of water and large amount of soil;
E) Mixture of water and minor amount of salt;
3. Please mark the region representing the superheated vapor:
A) Region A;
B) Region B;
C) Region C;
D) Region D;
E) None of above;
4. Please circle the valid statement(s) about compressed liquid at temperature T and pressure P:
A) T
B) P < Psat @T (the saturation pressure at given temperature T);
C) u = ug@T (specific internal energy);
D) f T v > v @ (specific volume);
E) x = 0.5 ;
5. Please circle the valid statement(s) about superheated vapor with temperature T and pressure P:
A) P > Psat@T ;
B) T > Tsat@P ;
C) V > V g@T(specific volume);
D) u < ug@T (specific internal energy);
E) h > hg@T (specific enthalpy);
6. A system contains water at 2.0 MPa, 220°C. The phase of this water is:
A) Compressed Liquid;
B) Liquid-vapor mixture;
C) Superheated Vapor
D) Solid (ice);
E) Cannot be determined based on information provided;