I would guess that the answer here is endothermic or unfavourable. Endothermic reactions take in energy from the surroundings (in the form of heat). Formation of additional bonds between carbons anyway is generally unfavourable, therefore it needs to take in energy from its surroundings (thus the reaction vessel becomes cold)
This is a chemical reaction.
the bonds get larger and more bonds are created
Chemical reactions always involve changes in the chemical bonds that join atoms in compounds. At least one chemical bond is broken or formed during a chemical reaction.
During a chemical reaction the breaking of the older bonds and formation of the new bonds take place.
Endothermic Reaction
This is a chemical reaction.
In a chemical reaction, the bonds of the reactants are broken. The atoms will rearrange and new bonds will form.
the bonds get larger and more bonds are created
Chemical reactions always involve changes in the chemical bonds that join atoms in compounds. At least one chemical bond is broken or formed during a chemical reaction.
The atoms involved in a chemical reaction have their bonds broken, new bonds formed, or existing bonds rearranged depending on the reaction type.
The existing chemical bonds break and new bonds are created to give products.
They are called chemical bonds, or just bonds.
Some or all of the existing chemical bonds in the reactants are broken and new chemical bonds are formed in the products.
During a chemical reaction the breaking of the older bonds and formation of the new bonds take place.
Endothermic Reaction
A new molecule is formed after a chemical reaction.
do not break bonds