At 25°C and 1 atm pressure, the enthalpies of combustion are as given below: Substance H…
Chemistry · JEE Main · NTA Exams — Chemical Thermodynamics
At 25°C and 1 atm pressure, the enthalpies of combustion are as given below:
The enthalpy of formation of ethane is
(JEE Main 2022)
| Substance | H2 | C(graphite) | C2H6(g) |
| \(\frac{\mathrm{A}_{\mathrm{e}} \mathrm{H}^{-}}{\mathrm{kJ} \mathrm{~mol}^{-1}}\) | –286.0 | –394.0 | –1560.0 |
The enthalpy of formation of ethane is
(JEE Main 2022)
- +54.0 kJ mol–1
- –68.0 kJ mol–1
- –86.0 kJ mol–1
- +97.0 kJ mol–1
Answer
(C) –86.0 kJ mol –1
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