Consider the following cases of standard enthalpy of reaction (Hr 0 in kJ mol–1) C2H6(g) + 7 O2(g) 2 — JEE Mains Chemistry Past Papers Chemistry Question

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Consider the following cases of standard enthalpy of reaction (Hr 0 in kJ mol–1) C2H6(g) + 7 O2(g) 2CO2(g) + 3H2O() Hº1 = – 1550 C(graphite) + O2(g) CO2(g) Hº2 = – 393.5 H2(g) + 1 O2(g) H2O() Hº3 = – 286 The magnitude of (g) H C o f 2 H is _______ kJ mol–1 (Nearest integer).