Who stated that enthalpy change in a chemical reaction is same whether the reaction takes place in single step or in several steps?
Correct answer: D. Hess's Law
- A. Arrhenius' Law
- B. Born Haber's Law
- C. Dalton's Law
- D. Hess's Law
Explanation
Hess's Law states that the total enthalpy change of a reaction is the same, regardless of the pathway taken.It allows you to find the enthalpy change of complex reactions by adding up the enthalpy changes of simpler reactions.
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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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