Question

Question 1 of 10

Which part of this chemical process requires energy?
LiOH + HF → LiF + H₂O
OA. Breaking bonds in LiF and H₂O
OB. Forming bonds in LiF and H₂O
O C. Forming bonds in LiOH and HF
OD. Breaking bonds in LiOH and HF

Answer 1

The part of the chemical process that requires energy is Option D). Breaking bonds in LiOH and HF.

Step-by-step explanation:

In every chemical reaction, old bonds between atoms are broken before new bonds are formed. Breaking chemical bonds is an endothermic process, meaning it absorbs energy.

Therefore, the chemical process requires energy to break bonds in LiOH and HF, as breaking chemical bonds is an endothermic process that absorbs energy, making the option d) correct.

For example, in the bond-breaking and bond-making processes like 2H2 + O2 → 2H2O, energy is required to break the H-H and O-O bonds before forming the O-H bonds. Conversely, forming chemical bonds, like those in LiF and H2O in the given reaction, is an exothermic process that releases energy.