The specific enthalpy data are in columns

Question

Statement for Linked Answer Q01 & 02

The following table of properties was printed out for saturated liquid and saturated vapour of ammonia. The titles for only the first two columns are available. All that we know is that the other columns (columns 3 to 8) contain data on specific properties, namely, internal energy (kJ/kg), enthalpy (kJ/kg) and entropy (kJ/kg.K)

T(0C)	P(kPa)
–20	190.2	88.76	88.76	0.3657	5.1655	1299.5	1418.0
0	429.6	179.69	0.714	180.36	5.3309	1318.0	1442.2
20	857.5	272.89	1.048	274.30	5.0860	1332.2	1460.2
40	1554.9	272.89	1.374	371.43	4.8662	1341.0	1470.2

 

1. The specific enthalpy data are in columns                                                                                                                                  

      (a) 3 and 7                                                          (b) 3 and 8

      (c) 5 and 7                                                          (d) 5 and 8

 

    2 . When saturated liquid at 40⁰C is throttled to –20⁰C, the quality at exit will be                                                                                       

      (a) 0.189                                                             (b) 0.212

      (c) 0.231                                                             (d) 0.788