akatian268 akatian268 17-05-2023 Chemistry contestada Calculate the standard enthalpy change for the reaction 2A+B⇌2C+2D2A+B⇌2C+2D where the heats of formation are given in the following table: Substance ΔH∘fΔHf∘ (kJ/molkJ/mol) AA -233 BB -401 CC 213 DD -481 Express your answer in kilojoules.