Chemistry

Problem

Using the data below, determine the standard enthalpy change, in kJ, for the reaction 2 NO(g) + O₂(g) → 2 NO₂(g). ΔH_f° values (kJ mol⁻¹): NO(g) = +90.3; NO₂(g) = +33.2; O₂(g) = 0

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