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The heat evolved on combustion of 1 g starch into and is kJ
CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics
Problem
The heat evolved on combustion of 1 g starch
(
C
6
H
10
O
5
)
n
\left(C_6H_{10}O_5\right)_n
(
C
6
H
10
O
5
)
n
into
C
O
2
CO_2
C
O
2
and
H
2
O
(
l
)
H_2O(l)
H
2
O
(
l
)
is
17.49
17.49
17.49
kJ
g
−
1
g^{-1}
g
−
1
. Compute the enthalpy of formation of 1 g starch. Given
Δ
H
f
\Delta H_f
Δ
H
f
of
H
2
O
(
l
)
=
−
285.85
H_2O(l) = -285.85
H
2
O
(
l
)
=
−
285.85
kJ
m
o
l
−
1
mol^{-1}
m
o
l
−
1
,
Δ
H
f
\Delta H_f
Δ
H
f
of
C
O
2
=
−
293.7
CO_2 = -293.7
C
O
2
=
−
293.7
kJ
m
o
l
−
1
mol^{-1}
m
o
l
−
1
.
Related theory
Hess's Law
Thermodynamics
Types of enthalpy
Enthalpy Changes of Reactions
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