The term "active mass" used in the Law of Mass Action means:
Correct answer: B. Number of moles per dm3
- A. Number of moles per dm2
- B. Number of moles per dm3
- C. Gram per dm'
- D. Number of moles
- E. Number of molecules
Explanation
The term "active mass" in the Law of Mass Action refers to the concentration of a substance involved in a chemical reaction, usually expressed in moles per decimetercube (mol/dm3) for solutions or partial pressure for gases. The Law of Mass Action states that the rate of a chemical reaction is directly proportional to the product of the active masses (concentrations) of the reactants, each raised to the power of their respective stoichiometric coefficients in the balanced chemical equation.
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About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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