JEE Main 2022 Chemistry question
At 25°C and 1 atm pressure, the enthalpies of combustion are as given below :
| Substance | | C(graphite) | | |---|---|---|---| | / kJ | −286.0 | −394.0 | −1560.0 |
The enthalpy of formation of ethane is
Answer: (3)
Solution
For 2C(graphite) + , of
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