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Select the correct law for the following statement. During a chemical reaction mass is neither created nor destroyed.
Law of thermodynamic
Henry's Law
Charles Law
Law of conservation of mass
Law of conservation of mass
The statement "During a chemical reaction mass is neither created nor destroyed" represents the Law of Conservation of Mass. It states that the total mass of the reactants before a chemical reaction is equal to the total mass of the products after the reaction.
The statement "During a chemical reaction mass is neither created nor destroyed" represents the Law of Conservation of Mass. It states that the total mass of the reactants before a chemical reaction is equal to the total mass of the products after the reaction.
If you bake a cake, the total weight of all the raw ingredients (flour, sugar, eggs, milk) mixed together equals the weight of the freshly baked cake (including any gases like steam that escape during baking, if collected in a closed system).
Mass in = Mass out (Lavoisier's Law)
Mass┬аof┬аReactants=Mass┬аof┬аProducts
minitialтАЛ=mfinalтАЛ тАФ Principle of mass conservation
In a chemical reaction, atoms are neither created nor destroyed; they are simply rearranged to form new substances. Because the total number of atoms of each element remains constant before and after the reaction, the total mass must also remain conserved.
Proposed by Antoine Lavoisier in 1789, often considered the father of modern chemistry.
Serves as the foundational basis for balancing chemical equations in stoichiometry.
Holds true for all chemical reactions and physical changes, though nuclear reactions involve mass-energy equivalence (E=mc2).
Allows chemists to calculate exact stoichiometric amounts of reactants and products.
Provides a quantitative check for balanced chemical equations.
Fails to account for mass converted into energy in nuclear reactions (where mass-energy equivalence applies).
Balancing chemical equations in industrial and laboratory synthesis.
Quantitative analytical chemistry and titration calculations.
Option A (Law of thermodynamic): Refers to laws governing heat, work, and energy (e.g., First Law states energy is conserved, not mass).
Option B (Henry's Law): Relates gas solubility in liquids to partial pressure.
Option C (Charles's Law): Relates gas volume directly to absolute temperature at constant pressure.
D is correct тАФ Law of conservation of mass states that mass can neither be created nor destroyed in a chemical reaction.
Always remember that while mass is conserved in chemical reactions, mass can be converted into energy in nuclear fission and fusion according to Einstein's equation (E=mc2).
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