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4 years ago

To break a chemical bond, energy must be(1) absorbed (2) destroyed (3) produced (4) released

Chemistry

2 answers:

n200080 [17]4 years ago

6 0

To break a chemical bond, energy must be $\boxed{\left( 1 \right){\text{ absorbed}}}$ .

Further explanation:

The attraction existing between atoms and molecules that facilitate the formation of various chemical compounds is termed as a chemical bond. It is formed either due to electron transference or by electron sharing between the bonded atoms. The chemical bond formed as a result of electron transfer from one atom to another is known as an ionic bond. The bond formed by the mutual sharing of electrons is called a covalent bond.

Endothermic process

The basic meaning of “endo” is “in”. These processes need energy from the surroundings, generally in the form of heat. Photosynthesis, evaporation of water, sublimation of dry ice, and melting of ice are some of the examples of endothermic processes.

Exothermic process

The general meaning of “exo” is “out”. These processes release energy from the system to the surroundings in the form of heat. Combustion of fuels, thermite reactions, nuclear reactions, and neutralization reactions are some examples of exothermic processes.

Since bond breaking is an endothermic reaction, energy must be supplied or absorbed from the surroundings to the system. Therefore, option (1) is the correct answer.

Learn more:

Which of these is an extensive property? brainly.com/question/1398514
Which of the phase changes is an exothermic change? brainly.com/question/1875234

Answer details:

Grade: High School

Chapter: Chemical reactions

Subject: Chemistry

Keywords: chemical bond, ionic bond, covalent bond, exothermic, endothermic, in, out, heat, photosynthesis, melting of ice, thermite reactions, neutralization reactions.

Troyanec [42]4 years ago

3 0

Answer: 1) absorbed

Explanation:

As a chemical bond is formed either by transfer of electrons or sharing of electrons, in order to break the forces of attraction among atoms, energy must be absorbed.

Energy is produced or released when a chemical bond is formed.

Energy is never destroyed, it converts from one form to another.

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At catalyst is ______.

AlexFokin [52]

Heya!!!

Answer to your question:

A catalyst is ______
B. Not used up in a reaction.

Catalyst do not change the amount of reactants or products or itself get used but it just change the rate of reaction.

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4 0

4 years ago

Which represents the ionization of a strong electrolyte?

GREYUIT [131]

Answer:

Explanation:

Strong electrolytes completely ionize when dissolved, and no neutral molecules are formed in solution. Since NaCl is an ionic solid (s), which consists of cations Na+ and anions Cl−, no molecules of NaCl are present in NaCl solid or NaCl solution. The ionization is said to be complete.

8 0

3 years ago

Read 2 more answers

12. If a substance has a pH of 3.5, is it<br> acidic or basic?

dolphi86 [110]

The answer is acidic.

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6 0

3 years ago

Usually, when the temperature is increased, what will happen to the rate of dissolving?

True [87]

Answer:

B) It will increase.

Explanation:

Solubility tends to increase with an increase in temperature

5 0

3 years ago

What kind of bond will form between the atoms?

just olya [345]

Answer:- (i) phosphorous and chlorine is polar covalent.

(ii) potassium and oxygen is ionic.

(iii) fluorine and fluorine is nonpolar covalent.

(iv) copper and aluminum is metallic.

(v) carbon and fluorine is polar covalent.

(vi) carbon and hydrogen is nonpolar covalent.

(vii) Aluminum and oxygen is ionic.

(viii) silver and copper is metallic.

Explanations:- An ionic bond forms between a metal and a non metal by the transfer of metal atom valence electrons to the non metal. In (ii) and (vii) the bond is between a metal and a non metal. Potassium is a metal and oxygen is non metal, so the bond between them is ionic. Similarly, Aluminum is a metal and oxygen is a non metal, so the bond between them is also ionic.

Metallic bond is formed between metals only. In (iv) we have metals copper and aluminum and in (viii) we have metals silver and copper. So, there would be metallic bond only.

Covalent bond is formed by the sharing of electrons between non metals. If the bond is between two similar non metals for example H and H, Cl and Cl, N and N etc then it is known as nonpolar covalent as the shared electrons are between both the non metals.

If the bond is formed between two different non metals like C and F, H and Cl etc then it is known as polar covalent as the shared electrons are more towards the more electron negative atom and due to which the highly electron negative atom has partial negative and the less electron negative atom has partial positive charge.

Note:- Even if the bond is between two different non metals but the electron negativity difference is too low then it is considered as nonpolar covalent.

Electron negativity difference between C and H is very low and so the C-H bond is considered as nonpolar covalent.

6 0

3 years ago