For the reaction; NaOH + HCI ⟶ NaCI + H2O the change in enthalpy is called:
Correct answer: B. Enthalpy of neutralization
- A. Enthalpy of formation
- B. Enthalpy of neutralization
- C. Enthalpy of sublimation
- D. Enthalpy of reaction
Explanation
The change in enthalpy for the reaction NaOH + HCl → NaCl + H2O is called the enthalpy of neutralization.The enthalpy of neutralization is the amount of heat released when one mole of an acid reacts with one mole of a base to form water. The heat of neutralization for the reaction NaOH + HCl → NaCl + H2O is -57.1 kJ/mol. This means that 57.1 kJ of heat is released when one mole of NaOH and one mole of HCl react to form NaCl and H2O.
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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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