Th e chemical industry converts hydrocarbons of low molecular mass to larger and more useful compounds. Calculate the change in enthalpy for the synthesis of cyclohexane (C₆H₁₂), a compound used in the production of nylon, from ethylene.

Use the information in Example 5.8 and the thermochemical equation for the combustion of cyclohexane:

Strategy

Arrange the thermochemical equations so that the reactant, C₂H₄, is on the left and the product, C₆H₁₂, is on the right. The other products and reactants should all cancel so that the desired reaction is all that remains.

Example 5.8

Hydrogenation of hydrocarbons is an important reaction in the chemical industry. A simple example is the hydrogenation of ethylene to form ethane. Calculate the enthalpy change for 

Use the following thermochemical equations to determine the overall enthalpy change.

Transcribed Image Text:

3C,H4(g) → C%H12(0) ΔΗ = ? =