Question

What is the enthalpy change for the isomerization of butene-1 to butene-2, given that the standard enthalpy of formation for butene-1 and butene-2 are -123 kJ/mol and -131 kJ/mol respectively?

Answer 1

To calculate the enthalpy change for the isomerization of butene-1 to butene-2, we can use the following equation:H = Hf products  - Hf reactants In this case, the reactant is butene-1 and the product is butene-2. The standard enthalpy of formation for butene-1 is -123 kJ/mol and for butene-2 is -131 kJ/mol.H =  -131 kJ/mol  -  -123 kJ/mol H = -8 kJ/molThe enthalpy change for the isomerization of butene-1 to butene-2 is -8 kJ/mol.