Question

What phase containing H20 under each of the following conditions. Show your work and explain your reasoning could phases exist in system or а Р, КРа v, m3 / kg H, kJ/kg Phase description T, °C 50 4.16 Saturated vapor 200 250 400 110 600

Answer 1

Row At s0C specific volume of saturated Liguid o001012m/kg 12 OSO Vapo = IN Satunated poessuse 12 3 KPa If P 12.34 kPa Vwill be less than 0-0010/2 Since it will be Subcooled liouid at that poessuse If P 12-34 PaV will be gectos than 120s0 mlk Since it Usill be Supeo heatedl steam at that paessuoe Buit we have V4.16 12.34 Pa P = mix turve of will then contain Ous system satuoated Liquid and satusated vapoar let be the foaction ot wates in saturoatal liquid In our system & (o.001012)+(- )(12-050)- 416 mg 12-OSO -4.16= 2 (12-05-o 001012) O.655

at so'c 2592-2 Kka H of satuaated s vapos Satusated liquid= 209 3 kTJkg H of mixture =(2093)+ (i-)25922) Co655x209 3)+(655)2522 S l031-81 KJkaeh H of ours FSDriuboe Rou 2 loobelue goindos motee po0 System contauns Given P- 200KPa & the satuoated vapo 0 Foom steam table T 120c = O.89 I5 m V odab saSt H2706.0 KJ|kg o.clde lo 8-180 Row3 GiNen T- 25oc saturoated poessuse at this tempasatase is Issy9 KA ecroo P (400 ka) Psat (I554.9 KPa) system contains supesheated vapos bugl bboePSar ars

Foom steam table for Supeoheated vapors O 59517 m V= H= 2964 5 KT|ke Row Grniven T- 1oc Satuoated poessuse at Io.c is 143.27 KPa P C600 KPa)> Psat C43 27 KPa) Ouo system contains sulbcooled liguid Foom steam tables I mlkg 461-69 KTka V O-00105 Phase descsetio H P T Nix. of sat liq, Sat vap 4.16 l031.3 12-34 Satuoated vapos 2706 O3915 200 120 2964.5 Supesheated vapos 400 O.59517 25D L461 69 Sodled liqud O.001O5 600 110

phase description is determined by comparing the system pressure and saturated pressure.

the values of the variables are found out with the help of steam tables