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From the standard enthalpies of combustion given below in ( ) and standard enthalpy…
CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics
Problem
From the standard enthalpies of combustion given below in (
kJ mol
−
1
\text{kJ mol}^{-1}
kJ mol
−
1
) and standard enthalpy of acetylene, find the standard enthalpy change when acetylene is hydrogenated to ethane. (
C
=
−
394
\text{C} = -394
C
=
−
394
,
H
2
=
−
286
\text{H}_2 = -286
H
2
=
−
286
,
C
2
H
6
=
−
1560
\text{C}_2\text{H}_6 = -1560
C
2
H
6
=
−
1560
,
C
2
H
2
=
+
227
\text{C}_2\text{H}_2 = +227
C
2
H
2
=
+
227
)
Related theory
Thermodynamics
Hess's Law
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