The standard enthalpies of combustion of cis-2-hexene and trans-2-hexene (to form carbon dioxide and water) are −3727.9 kJ·mol−1 and −3726.3 kJ·mol−1, respectively. Calculate the enthalpy of the following isomerization process.

The enthalpy of the following isomerization process is -1.6kJ/mol.

Explanation:

Combustion of 1 mole of hexane gives 6 moles of carbon dioxide gas and 6 moles of water.

And so will be products of combustion of cis-2-hexene and trans-2-hexene, But energy released during the reaction will be different.

..[1]

[2]

Enthalpy of the isomerization process of cis-2-hexene to trans-2-hexene.

...[3]

[1] - [2] =[3]

(Hess's law)

The enthalpy of the following isomerization process is -1.6kJ/mol.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).