Write equations to express enthalpies of formation of
(a) Sulphur trioxide (c) water
(b) Ethyl alcohol
Plzz help..
Answers
Answered by
1
Answer:
ethyl alcohol, this is the answer
Answered by
3
Answer:
C
2
H
5
OH
(l)
+3O
2
(g)
⟶2CO
2
(g)
+3H
2
O
(l)
ΔH=−1368kJ
2CO
2
(g)
+3H
2
O
(l)
⟶C
2
H
5
OH
(l)
+3O
2
(g)
ΔH=1368kJ.....(1)
C
(s)
+O
2
(g)
⟶CO
2
(g)
ΔH=−393.5kJ
2×[C
(s)
+O
2
(g)
⟶CO
2
(g)
ΔH=−393.5kJ]
2C
(s)
+2O
2
(g)
⟶2CO
2
(g)
ΔH=−787kJ.....(2)
H
2
(g)
+
2
1
O
2
(g)
⟶H
2
O
(l)
ΔH=−286.0kJ
3×[H
2
(g)
+
2
1
O
2
(g)
⟶H
2
O
(l)
ΔH=−286.0kJ]
3H
2
(g)
+
2
3
O
2
(g)
⟶3H
2
O
(l)
ΔH=−858.0kJ.....(3)
Adding eq
n
(1),(2)&(3), we have
2C
(s)
+3H
2
(g)
+
2
1
O
2
(g)
⟶C
2
H
5
OH
(l)
ΔH=−277
Hence the enthalpy of formation of ethyl alcohol is −277kJ.
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