What is required for reactants to form bonds?

Answer 1

Firstly, I will begin by stating that for every chemical reaction there is an activation energy. This means, a reaction requires energy to undergo; however, this energy is most often take from the environment, such as in the form of heat. In some cases, the reactants require a great deal of energy and are thus supported by energy providers like ATP or reaction facilitators such as enzymes. In the area of bonds, many reactions entail a change in the bonds contained in the molecule produced. For example, when glucose is broken down to produce ATP, it's bonds are removed and its atoms placed onto new molecules. Thus, for this reaction and most others, the bonds are broken and replaced. Moreover, in the production of disaccharides, only one bond is broken on each monosaccharide, by way of a dehydration reaction. The leftover ends of each molecule, wanting to bond and this achieve a less reactive state, then attach. Thus, bonds are broken and replaced here as well. As such, it can be concluded that in a chemical reaction, the reactants' bonds are changed, not always totally, but in the removal of done bonds and addition of others.

Answer 2

It is called the Activation energy .

It's value is high in endothermic reactions , but low in the exothermic ones .

( Just like in Photosynthesis ; The Sunlight provides the energy needed to change carbon dioxide and water into glucose and oxygen " Endothermic-ally " ) .

Answer 3

When the atoms rearrange and they hit each other hard enough to form a bond.

Answer 4

Activation energy and possibly a catalyst. In living systems catalysts are usually enzymes.

Answer 5

Input of energy

Answer 6

energy input

Answer 7

A positive Chemo-Thermal gradient.