Reaction taking place in one step or in several steps have same ΔH. it is:
Correct answer: B. Hess's law
- A. Lussac's law of combining volume
- B. Hess's law
- C. Boyle's law
- D. Charle's law
- E. Avagadro's law
Explanation
Hess's law states that the enthalpy change of a reaction is independent of the pathway taken from reactants to products. In other words, the total enthalpy change of a reaction is determined only by the initial and final states of the reaction, regardless of whether the reaction occurs in one step or multiple steps.
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About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
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