thermochimie I

C6H5CH3(g)+ 3H2(g)C6H11CH3(l)
25oC
Co
p,m(J.mol−1.K−1) ∆fHo(kJ.mol−1)
C6H5CH3(g)81,59 50
C6H11CH3(l)135,4−154,8
H2(g)2,53 0
∆fHo(H2(g))=0
25oC
100oC Co
p,m,i
T
C6H5COOH(s)
298K
298K
∆fHo(H2O(l)) = −285,5kJ.mol−1∆fHo(CO2(g)) = −393,1kJ.mol−1∆fHo(O2(g)) = 0
∆combHo(C6H5COOH(s)) = −3227,8kJ.mol−1
C2H2(g)+ 2H2(g)C2H6(g)
∆rSo
298K
350K
298K
So
m(J.mol−1.K−1)Co p,m(J.mol−1.K−1)
C2H2(g)200 46,6
C2H6(g)229,5 57,2
H2(g)130,62 29

CaCO3(s)CaO(s)+CO2(g)
298K
Co
p,m(J.mol−1.K−1) ∆fHo(kJ.mol−1)So m(J.mol−1.K−1)
CaCO3(s)111 −1207 90
CaO(s)48 −634 40
CO2(g)46 −394 214
298K
∆rGo
∆rHo∆rSo
∆rGo= ∆rHo−T.∆rSo
∆rGo= Σνi∆fGo
i
C4H4S(g)+ 4H2(g)C4H10(g)+H2S(g)
298K
C4H4S(g)
298K
∆fHo(kJ.mol−1)So
m(J.mol−1.K−1) ∆fGo(kJ.mol−1)
C4H4S(g)117 −123
H2(g)0 130 0
C4H10(g)−127 310 −14
H2S(g)−21 206 −32