Question

remove the two oxygen atoms and observe that the claws get replaced by an outline of a water molecule. drag one oxygen atom and one hydrogen atom into the outline and click the \create bond\ button. observe the energy that is released when one o - h bond forms. drag a second hydrogen atom to the outline and click the \create bond\ button to create a water molecule. drag the molecule away from the outline and create a second water molecule. enter the correct values in the boxes. energy released to form one o - h bond: kj/mol energy released to form one h₂o molecule: kj/mol total energy released to form two h₂o molecules: kj/mol

Explanation:

Step1: Recall O - H bond energy

The energy released to form one O - H bond is approximately 463 kJ/mol.

Step2: Calculate energy for one H₂O molecule

A water molecule (H₂O) has 2 O - H bonds. So the energy released to form one H₂O molecule is $2\times463$ kJ/mol = 926 kJ/mol.

Step3: Calculate energy for two H₂O molecules

The total energy released to form two H₂O molecules is $2\times926$ kJ/mol = 1852 kJ/mol.

Answer:

Energy released to form one O - H bond: 463 kJ/mol
Energy released to form one H₂O molecule: 926 kJ/mol
Total energy released to form two H₂O molecules: 1852 kJ/mol