Subiecte licenta 2013 ISAPM
Subiecte licenta 2013 ISAPM
Subiecte licenta 2013 ISAPM
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
P2.<br />
P3.<br />
V =<br />
3<br />
= 800L 0,<br />
8m<br />
; T = 250 + 273 = 523 K<br />
5<br />
PV 1⋅10<br />
⋅0,<br />
8<br />
PV = νRT<br />
; ν = = = 18,<br />
40 moli<br />
RT 8,<br />
314⋅<br />
523<br />
a) ;<br />
⎛ ∂H<br />
⎞ ⎛ ∂H<br />
⎞<br />
dH = ⎜ ⎟ dT + ⎜ ⎟ dP = 0 ; ΔH = 0<br />
⎝ ∂T<br />
⎠ P ⎝ ∂P<br />
⎠T<br />
5<br />
P1<br />
1⋅10<br />
ΔU = Q + W W = − Q = −ν<br />
RT ln = −18,<br />
40⋅<br />
8,<br />
314⋅<br />
523ln<br />
= 87897 J<br />
5<br />
P2<br />
3⋅10<br />
b) W = −PΔV<br />
= 0J<br />
CV P<br />
= C − R = 42,<br />
15 − 8,<br />
314 = 33,<br />
836 J / mol ⋅ K<br />
Q = ΔU<br />
= ν<br />
V<br />
ΔH<br />
= ν<br />
T2<br />
T2<br />
( 773−<br />
523)<br />
∫CVdT = 18,<br />
40 ∫ 33,<br />
836dT<br />
= 18,<br />
40⋅<br />
33,<br />
836 =<br />
T1<br />
773<br />
523<br />
( 773 − 523)<br />
∫CPdT = 18,<br />
40 ∫ 42,<br />
15dT<br />
= 18,<br />
40⋅<br />
42,<br />
15 =<br />
T1<br />
500<br />
∫<br />
773<br />
523<br />
500<br />
∫<br />
193890<br />
155645,<br />
6<br />
J<br />
( 500 − 298)<br />
o<br />
o<br />
Δ r H 500 = Δ r H 298 + Δ rC<br />
PdT<br />
= 95200 + − 4,<br />
6dT<br />
= 95200 − 4,<br />
6 = 94270,<br />
8J<br />
298<br />
298<br />
500<br />
500<br />
o<br />
o Δ rC<br />
P<br />
− 4,<br />
6<br />
500<br />
Δ r S 500 = Δ r S 298 + ∫ dT = 181,<br />
65 + dT = 181,<br />
65 − 4,<br />
6 ln = 179,<br />
27J<br />
/ K<br />
T ∫ T<br />
298<br />
Δ<br />
r<br />
G<br />
o<br />
500<br />
= Δ<br />
r<br />
H<br />
o<br />
500<br />
298<br />
−TΔ<br />
r<br />
S<br />
o<br />
500<br />
298<br />
= 94270,<br />
8 − 500⋅179,<br />
27 = 4635,<br />
8J<br />
o<br />
Δ<br />
4635,<br />
8<br />
rG500<br />
−<br />
−<br />
o<br />
RT 8,<br />
314 ⋅ 500<br />
Δ rG500<br />
= −RT<br />
ln K 0 K 0 = e = e = 0,<br />
328<br />
P / P P / P<br />
Număr de moli R(g) P1(g) P2 (g) Total<br />
iniţial 1 0 0 1<br />
transformaţi α 0 0 α<br />
la echilibru 1-α α α ∑ ne<br />
= 1+<br />
α<br />
Δν = 1 + 1−<br />
1 = 1<br />
K o<br />
P / P<br />
= K<br />
n<br />
⎛<br />
⎜<br />
⎜<br />
⎜<br />
⎝<br />
∑<br />
P<br />
o<br />
P<br />
n<br />
e<br />
⎞<br />
⎟<br />
⎟<br />
⎟<br />
⎠<br />
Δν<br />
= K<br />
n<br />
o ⎛ 0,<br />
1P<br />
⎞<br />
⎜ ⎟<br />
o<br />
⎜ P ⎟<br />
⎜ 1+<br />
α ⎟<br />
⎜ ⎟<br />
⎝ ⎠<br />
1<br />
= K<br />
n<br />
0,<br />
1<br />
K<br />
1+<br />
α<br />
n<br />
2<br />
α<br />
=<br />
1 − α<br />
J<br />
27