Hess's law states that the total enthalpy change of a reaction remains same regardless of:
Correct answer: A. Route taken by reaction for completion
- A. Route taken by reaction for completion
- B. Temperature of reactants
- C. Concentration of products
- D. Concentration of reactants
Explanation
Hess's law states that the total enthalpy change of a reaction remains the same regardless of the route taken by the reaction for completion. This principle is based on the conservation of energy in chemical reactions. This means that if a chemical reaction can take place through multiple intermediate steps or pathways, the overall enthalpy change for the reaction will be the same, as long as the initial and final reactants and products are the same.
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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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