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When 2 mole of are completely burnt, 3129 kJ of heat is liberated
CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics
Problem
When 2 mole of
C
2
H
6
(
g
)
C_2H_6(g)
C
2
H
6
(
g
)
are completely burnt, 3129 kJ of heat is liberated. Calculate the heat of formation of
C
2
H
6
(
g
)
C_2H_6(g)
C
2
H
6
(
g
)
.
Δ
H
f
\Delta H_f
Δ
H
f
for
C
O
2
(
g
)
CO_2(g)
C
O
2
(
g
)
and
H
2
O
(
l
)
H_2O(l)
H
2
O
(
l
)
are
−
395
-395
−
395
and
−
286
-286
−
286
kJ
m
o
l
−
1
mol^{-1}
m
o
l
−
1
respectively.
Related theory
Thermodynamics
Hess's Law
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