Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
The hydrogenation reaction has a standard enthalpy change of
CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics
Problem
The hydrogenation reaction
C
2
H
4
(
g
)
+
H
2
(
g
)
→
C
2
H
6
(
g
)
C_2H_4(\text{g}) + H_2(\text{g}) \to C_2H_6(\text{g})
C
2
H
4
(
g
)
+
H
2
(
g
)
→
C
2
H
6
(
g
)
has a standard enthalpy change of
−
136.8
k
J
-136.8\,\mathrm{kJ}
−
136.8
kJ
. Given
Δ
H
f
∘
\Delta H_f^\circ
Δ
H
f
∘
values (
k
J
m
o
l
−
1
\mathrm{kJ\,mol^{-1}}
kJ
mo
l
−
1
):
C
2
H
4
(
g
)
=
+
52.5
C_2H_4(\text{g}) = +52.5
C
2
H
4
(
g
)
=
+
52.5
;
H
2
(
g
)
=
0
H_2(\text{g}) = 0
H
2
(
g
)
=
0
, calculate the standard enthalpy of formation of
C
2
H
6
(
g
)
C_2H_6(\text{g})
C
2
H
6
(
g
)
.
Related theory
Thermodynamics
Types of enthalpy
Enthalpy Changes of Reactions
Browse the problem library