NVAMediumJEE Main 2025 · 3 April, Shift 1Enthalpies (Bond, Combustion, Formation…)

Chemistry Question from JEE Main 2025 · 3 April, Shift 1

Given :

ΔHsub⊖[C(graphite)]=710 kJ mol−1\Delta H^{\ominus}_{\text{sub}}[C(\text{graphite})] = 710 \, \text{kJ mol}^{-1}

ΔC−HH⊖=414 kJ mol−1\Delta_{C-H} H^{\ominus} = 414 \, \text{kJ mol}^{-1}

ΔH−HH⊖=436 kJ mol−1\Delta_{H-H} H^{\ominus} = 436 \, \text{kJ mol}^{-1}

ΔC=CH⊖=611 kJ mol−1\Delta_{C=C} H^{\ominus} = 611 \, \text{kJ mol}^{-1}

The ΔfH⊖\Delta_f H^{\ominus} for CH2=CH2\text{CH}_2=\text{CH}_2 is _____ kJ mol−1\text{kJ mol}^{-1} (nearest integer value)

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