What is reaction and what is the difference between reaction and chemical reaction?
Answers
Explanation:
A reaction or chemical reaction is a chemical change which forms new substances. In other words, reactants react to form products that have a different chemical formula. Indications a reaction has occurred include temperature change, color change, bubble formation, and/or precipitate formation.In a chemical reaction, the atoms and molecules produced by the reaction are called products. ... No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.
Sl. No. Differentiating Property Physical Change Chemical Change
1 Explanation In a physical change, the molecules are rearranged while their actual composition remains same. In a chemical change, the molecular composition of a substance completely changes and a new substance is formed.
2 Example Some example of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.
3 Reversibility Physical change is easily reversible i.e original substance can be recovered. Chemical change is irreversible i.e. original substance cannot be recovered.
4 Formation of new substance In physical change, no new substance is formed. A chemical change is always accompanied by one or more new substance(s).
5 Type of Change Physical change is a temporary change. Chemical change is a permanent change.
6 Energy Production In a physical change, no energy is produced. In a chemical change, energy is produced (heat, light, sound, etc.)
7 Absorption of Energy Physical change involves very little to no absorption of energy. During chemical reaction, absorption and evolution of energy takes place.
8 Affects Physical change affects only physical properties i.e. shape, size, etc. Chemical change both physical and chemical properties of the substance including its composition.
Answer:
Reaction➪a chemical process in which substances act mutually on each other and are changed into different substances, or one substance changes into other substances.