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प्रश्न
Why energy is involved in a chemical change?
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उत्तर
In every chemical change, change in energy is involved.
There is a difference between the chemical energies of the reactants and products. It involves the breaking up of chemical bonds between the atoms resulting in the absorption of energy in the form of heat and simultaneous formation of bonds with the release of energy.
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संबंधित प्रश्न
State the effect of an endothermic reaction.
Identify the endothermic and exothermic reaction.
\[\ce{CaCO_{3(s)}->[\Delta] CaO_{(s)} + CO2}\]
Name a carbonate which do not decompose on heating.
Chemical reactions may proceed with evolution of heat. Give an example.
Give an example with a balanced equation, of the following reaction:
exothermic reaction
Give an example with a balanced equation, of the following reaction:
photochemical reaction
Differentiate between the following:
Electrolytic decomposition and photochemical decomposition.
Respiration is a ______ change.
Give a scientific reason.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
Give scientific reason.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is slowly added to water with constant stirring.
