Termo Unidad 2.docx

TECNOLOGICO NACIONAL DE MEXICO INTITUTO TECNOLOGICO DE CD. MADERO

TERMODINAMICA

UNIDAD 2A GASES IDEALES Y SUSTANCIA PURA

INTEGRANTES DE EQUIPO    

VEGA RAMIREZ ROBERTO JAFED MENDIETA PEREZ FABIOLA GUADALUPE CARLOS LEONARDO SOLIS REYES LIMON CRUZ JOSE DE JESUS

17070170 16071071 16071101 17070131

TABLA 3 Datos m = 5lb V = 14.02ft3 p1 = 190 psia p2 = 80 psia

V

V1=

𝑚

=

V1= 2.804

14.02𝑓𝑡 3 5𝑙𝑏 𝑓𝑡 3

h1 = 1259.0 s1 = 1.6189

µ1 = h1

480°F

𝑙𝑏 𝐵𝑡𝑢 𝑙𝑏 𝐵𝑡𝑢 𝑙𝑏

𝑝1𝑉1

-

𝐽 (190)(144)(2.804)

µ1 = 1259.0 -

778

µ1 = 1259.0 – 98.6 µ1 = 1160.4

𝐵𝑡𝑢 𝑙𝑏

Tabla 2 p = 80 psia

Vg

Vfg

5.472

5.45443

V = Vg – y Vfg y=

𝑉𝑔 −V 𝑉𝑓𝑔

y = 0.489

=

5.472−2.804 5.45443 ó

y = 48.9%

p = 80 psia hg = 1183.1

hfg = 901.1

h2 = hg – y hfg h2 = 1183.1 – (0.489) (901.1) h2 = 1183.1 – 440.63 h2 = 742.47 µg = 1102.1

µfg = 820.3

𝐵𝑡𝑢 𝑙𝑏

sg = 1.6207

sfg = 1.1676

µ2 = µg – y µfg

s2 = sg – y sfg

µ2 = 1102.1 – (0.489) (820.3)

s2 = 1.6207 – (0.489) (1.1676)

µ2 = 1102.1 – 401.1267

s2 = 1.6207 – 0.5709

µ2 = 700.9733

𝐵𝑡𝑢 𝑙𝑏

s2 = 1.0498

𝐵𝑡𝑢 𝑙𝑏

∆S = (S2 – S1) (m)

∆U = (µ2 – µ1) (m)

∆S = (1.0498 – 1.6189) (5)

∆U = (700.9733 – 1160.4) (5)

∆S = (–0.5691) (5)

∆U = (–459.4267) (5)

∆S = –2.8455

𝐵𝑡𝑢 𝑙𝑏°𝑅

Tabla 2 156 X 158

– – –

∆U = –2297.1335 Btu

2.904 2.804 2.869

2.869 − 2.904 ( ) (158 − 156) 2.804 − 2.904 −0.035 ( ) (2) = 0.7 −0.1

p = 156 + 0.7 p = 156.7 psia