Engineering, 02.03.2020 18:30 knikni06
Water, initially a saturated liquid at 140 oC, is contained in a piston-cylinder assembly. Thewater is heated to the corresponding saturated vapor state in an internally reversible process atconstant temperature and pressure. For a dead state at To= 20 °C and po= 1 bar, determine in kJ/kg:
(a) The change in exergy
(b) The exergy transfer accompanying heat
(c) The exergy transfer accompanying work
(d) The exergy destruction
Answers: 1
Engineering, 04.07.2019 18:10
Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.
Answers: 2
Engineering, 04.07.2019 18:20
Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. determine the mass of each gas and the apparent gas constant of the mixture.
Answers: 3
Engineering, 04.07.2019 18:20
Avolume of 2.65 m3 of air in a rigid, insulated container fitted with a paddle wheel is initially at 264 k, 5.6 bar. the air receives 432 kj by work from the paddle wheel. assuming the ideal gas model with cv = 0.71 kj/kg • k, determine for the air the amount of entropy produced, in kj/k
Answers: 2
Engineering, 04.07.2019 18:20
Describe one experiment in which the glass transition temperature and melting temperature of a totally amorphous thermoplastic material can be determined. show the relevant experimental results in a diagram which should be properly annotated with the two temperatures clearly marked. what is likely to happen to the curve in the diagram if the amorphous polymer is replaced by a thermosetting type?
Answers: 2
Water, initially a saturated liquid at 140 oC, is contained in a piston-cylinder assembly. Thewater...
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