The dissolution of NaCl is characterized by which of the following enthalpy changes? A) -802 B) 0 C) -6.02 D) 3.9
Understand the Problem
The question is asking about the enthalpy change associated with the dissolution of sodium chloride (NaCl) in water. To answer it, we need to know the specific thermodynamic properties and values related to this dissolution process.
Answer
D) 3.9
The final answer is D) 3.9
Answer for screen readers
The final answer is D) 3.9
More Information
When sodium chloride (NaCl) dissolves in water, the enthalpy change of the solution is an important thermodynamic property. The dissolution of NaCl in an excess of water is associated with an enthalpy change of +3.9 kJ/mol. This means it is an endothermic process.
Tips
A common mistake is confusing the sign and magnitude of the enthalpy change, as dissolution can be either endothermic or exothermic, depending on the substances involved.
Sources
- 5.9: Enthalpy of Solution - Chemistry LibreTexts - chem.libretexts.org
- Enthalpy Change of Solution - Chemistry LibreTexts - chem.libretexts.org
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