The enthalpy change of solution of Na2CO3 is a _ reaction?
Correct answer: A. Exothermic reaction
- A. Exothermic reaction
- B. Endothermic reaction
- C. Spontaneous reaction
- D. Non-spontaneous reaction
Explanation
During the enthalpy change of the solution of Na2CO3 , the temperature of the solvent rises showing that the process is exothermic. The enthalpy of the solution of Na2CO3 is -25 kJ/mol.
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About Exothermic and Endothermic Reactions
Exothermic reactions release heat to the surroundings and have negative enthalpy change, while endothermic reactions absorb heat and have positive enthalpy change. The topic uses energy profiles to identify reactants, products and activation energy, and includes bond energy, enthalpy diagrams, calorimetry and Hess's law for calculating overall heat changes.
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