Tehnička termodinamika - Kemijsko-tehnološki fakultet

_____________________________________________Prvi glavni zakon termodinamike
Q 1,2
Slika P2.11.
a)
b)
c)
Za T = konst.
V
m ⋅ R ⋅T
8.314
10 ⋅ ⋅ 290
29
1
3
1 = =
= 0.848 m
p1
980.7
V
p
10
1
3
2 = V1
= 0 .848 ⋅ = 8.48 m
p2
1
p1
8.314
W1 ,2 = m ⋅ R ⋅T
⋅ ln = 10 ⋅ ⋅ 290 ⋅ 2.3 ⋅ log10 = 1912 kJ
p 29
Q 1,2
= W1,2
za izotermu
2
Q1 ,2 = 1912 kJ
97