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Ajutoooooooooor!

La ce temperatura este incalzit azotul dintr-un recipient cu volumul de 10 m cubi, daca in recipient se afla 280 kg azot la presiunea de 5 atm? Vreau raspuns complet....


Răspuns :

pV=nRT
V=10m^3=10000l
M N2=2AN=28kg/kmol
n N2=280/28=10kmoli=10000moli
p=5atm
R=0,082atm*l*mol^-1*K^-1

5*10000=10000*0,082*T
T=5*10000/10000*0,082=60,9756K
T = ? °C ? °K

V = 10m³ = 10000L
m = 280kg = 280000g N₂
p = 5 atm

n = m/M = 280000/28 = 10000 moli N₂

p×V = n×R×T ⇒ T = p×V/n×R = 5×10000/10000×0,082 = 60,9756K

T°C = 273-60,9756 = 212°C