Question

why do reactions occur? during a chemical reaction, the __ form products when chemical in the reactants break and form in the products. • all reactions involve a in energy. o when new bonds are formed, chemical energy is . o when bonds are broken, energy is , or required to separate atoms. • we feel a change in when more bonds are being than being formed or vice versa. types of reactions • endothermic reaction: a chemical in which thermal energy is . the products will usually feel . o the products will have than the reactants. o more chemical bonds are being in the reactants than being in the products. • examples: baking, , photosynthesis, salt in water, __ ice cubes.

Explanation:

In a chemical reaction, atoms in reactants rearrange as bonds break and new bonds form in products. Energy changes occur with bond - breaking (energy absorbed) and bond - forming (energy released). Endothermic reactions absorb thermal energy, making products feel cold, having more energy than reactants, and with more bonds broken in reactants than formed in products. Examples include baking, photosynthesis, salt dissolving in water, and ice - cube melting.

Answer:

During a chemical reaction, the atoms form products when chemical bonds in the reactants break and form new bonds in the products.
All reactions involve a change in energy.
When new bonds are formed, chemical energy is released.
When bonds are broken, energy is absorbed, or required to separate atoms.
We feel a change in temperature when more bonds are being broken than being formed or vice versa.
Endothermic Reaction: a chemical reaction in which thermal energy is absorbed. The products will usually feel cold.
The products will have more energy than the reactants.
More chemical bonds are being broken in the reactants than being formed in the products.
Examples: Baking, Photosynthesis, Dissolving salt in water, Melting ice cubes.