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A chemical equation is written in the forward direction as
CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics
Problem
A chemical equation is written in the forward direction as
C
(
s
)
+
O
2
(
g
)
→
C
O
2
(
g
)
C(s) + O_2(g) \to CO_2(g)
C
(
s
)
+
O
2
(
g
)
→
C
O
2
(
g
)
Δ
H
=
−
394
kJ
\Delta H = -394\,\text{kJ}
Δ
H
=
−
394
kJ
. Identify the change, if any, to the numerical value and sign of
Δ
H
\Delta H
Δ
H
when this reaction is written in the reverse direction.
Related theory
Thermodynamics
Types of enthalpy
Enthalpy Changes of Reactions
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