Exercicio Ficha 24 -1

Exercicio Ficha 24 -1

∆ab = Qab - ab

P x V = n x R x T

Qab = n x Cv x (Tb - Ta) + Área

Qab = n x (3/2) x R x Tb - n x (3/2) x R x Ta + Área

Qab = (3/2) x Pb x Vb - (3/2) x Pa x Va + ((12+8)x8)/2

Qab = (3/2) x 8 x 10 - (3/2) x 8 x 2 + ((12+8)x8)/2

Qab = 240/2 - 48/2 + 160/2

Qab = 352/2 = 176 atm x l

Exercicio Ficha 24 -2

∆ab = n x Cv x (Tb - Ta)

P x V = n x R x T

∆ab = n x Cv x (Tb - Ta)

∆ab = n x (3/2) x R x Tb - n x (3/2) x R x Ta

∆ab = (3/2) x Pb x Vb - (3/2) x Pa x Va

∆ab = (3/2) x 8 x 10 - (3/2) x 8 x 2

∆ab = 240/2 - 48/2

∆ab = 192/2 = 96 atm x l

Exercicio 38

Ta = Tb = 400 K

(Pa x Va) / Ta = (Pb x Vb) / Tb

(Pa x 2) / 400 = (3 x 6) / 400

P2 = (0,045 x 400) / 2 = 9 atm

P x V = n x R x T

(Pa x Va) / Ta = n x R

(9 x 2) / 400 = n x R = 0,045 atm x l / K

Dab = n x Cv x (Tb - Ta)

P x V = n x R x T

Uab = n x Cv x (Tb - Ta)

Uab = n x (3/2) x R x Tb - n x (3/2) x R x Ta

Uab = (3/2) x Pb x Vb - (3/2) x Pa x Va

Uab = (3/2) x 3 x 6 - (3/2) x 9 x 2

Uab = 27 - 27 = 0

Qab = τab = Pa x Va x ln (Vb/Va)

Qab = τab = 9 x 2 x ln (6/2)

Qab = τab = 19,77 atm x l / K