Identify a reason that chemical reactions release energy during the reaction process.

Select one:
a. forming bonds
b. breaking bonds
c. storing energy
d. overcoming activation energy

When the energy is released the process is called exothermic reaction. This happens when the bonds are broken in the reactants and the system release energy.

Answer Link

donotbeidle donotbeidle · Answer 2 · 2019-10-03T19:18:07+02:00

Answer:

a. forming bonds

Explanation:

The energy required to break a bond is endothermic that is energy is absorbed to break a bond.

The energy is released in the formation of a bond that is energy is released when a bond is formed.

The formula to find the ∆H of the reaction is

∆H (reaction) = ∆H (bonds Broken) - ∆H (bonds formed)

For example

[tex]N_2+3H_2< >2NH_3[/tex]

[tex]N_2[/tex] contains one N≡N triple bond (Bond breaking 946 KJ per mol)

[tex]H_2[/tex] contains a single H-H bond (bond breaking 436 KJ per mol)

[tex]NH_3[/tex] contains 3, N - H single bonds(389 KJ per mol)

So ∆H (bonds broken) = 946 + (3 × 436) = 2254KJ

∆H (Bonds formed ) = (2 × 3 × 389) = 2334KJ

So

∆H (reaction) = 2254 KJ - 2334 KJ

= - 80KJ and the reaction is Exothermic

In this example we see energy required to break the bond is lesser than energy released in forming the bond.

Identify a reason that chemical reactions release energy during the reaction process. Select one: a. forming bonds b. breaking bonds c. storing energy d. overcoming activation energy

Respuesta :

Otras preguntas

Identify a reason that chemical reactions release energy during the reaction process.

Select one:
a. forming bonds
b. breaking bonds
c. storing energy
d. overcoming activation energy