When sodium chloride and metallic sodium are each dissolved in water
- both processes are exothermic
- both processes are endothermic
- the dissolution of metallic sodium is endothermic
-
the dissolution of metallic sodium is exothermic
- the dissolution of sodium chloride is explosive
The correct answer is: D
Explanation
When small quantities of sodium metal is added to water, there is an exothermic reaction, and they react to form sodium hydroxide and hydrogen.