1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
s344n2d4d5 [400]
3 years ago
14

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

Chemistry
2 answers:
Bess [88]3 years ago
5 0

Answer:

option b

Explanation:

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.

Usimov [2.4K]3 years ago
5 0

<u>Answer:</u>

<em>a. forming bonds</em>

<u>Explanation:</u>

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  

N_2+3H_2< >2NH_3

N_2 contains one N≡N triple bond (Bond breaking 946 KJ per mol)

H_2 contains a single H-H bond (bond breaking 436 KJ per mol)

NH_3 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.

You might be interested in
Ethanol melts at -114 °C and boils at 78 °C.
Aliun [14]
A) solid
b)liquid
c)liquid
d)gas
5 0
2 years ago
A teacher gives students four liquids commonly found in the kitchen - vinegar, apple juice, dish detergent, and milk - and pH in
VMariaS [17]

Answer:

1. Comparative

2. Independent variable

3. The pH is the Dependent variable

6 0
3 years ago
Read 2 more answers
How is n1 in the Rydberg equation related to the quantum number n in the Bohr model?How is n1 in the Rydberg equation related to
andre [41]

Ansddwdccwer:

ExplanationBecause:

7 0
3 years ago
I need an answer now please asap and you will me marked brainiest please it's missing I need it now.
valentina_108 [34]

Answer:

C. NaHCO3 → Na2CO3 + H2O + CO2

Explanation:

» For a balanced equation, the number of atoms of reactants and products must be equal.

» In equation C, the reactant side has one sodium atom while ptoduct side has 2 sodium atoms.

» The balanced equations mus be;

{ \rm{ 2NaHCO _{3(aq)} → Na _{2}CO _{3(s)}+ H _{2} O _{(l)} + }CO _{2(g)} }

7 0
2 years ago
Read 2 more answers
What is another common name for the lanthanoids on the periodic table?
RUDIKE [14]
Lanthanide Lanthanoid, also called Lanthanide
7 0
3 years ago
Other questions:
  • According to le chatelier's principle, increasing the pressure of the system shown below will shift equilibrium to the left (tow
    13·1 answer
  • What is the room temperature of water?
    13·1 answer
  • Which chemical is the reducing agent in the redox reaction below?
    5·2 answers
  • Which type of bond is present in hydrogen sulfide (H2S)? The table of electronegativities is given
    6·2 answers
  • There are three subatomic particles found inside atoms. Two of the subatomic particle have a charge of positive or negative. The
    15·2 answers
  • If 1.00 mol of argon is placed in a 0.500-L container at 22.0 ∘C , what is the difference between the ideal pressure (as predict
    10·1 answer
  • Review energy changes by identifying the correct statements about each reaction.
    7·1 answer
  • Which of the following is NOT needed for photosynthesis to take place?
    8·2 answers
  • HELP FAST PLZ!!!!!!!!!!!!!_____ energy from the outlet transfers energy to the light bulband
    15·2 answers
  • Which isotope in each pair is more stable? Why?(a) ¹⁴⁰₅₅Cs or ¹³³₅₅Cs
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!