When sodium chloride and metallic sodium are each dissolved in water A. both processes are
exothermic B. both processes are endothermic
C. the dissolution of metallic sodium is endothermic
D. the dissolution of metallic sodium is exothermic
E. the dissolution of sodium chloride is explosive​

B

Explanation:

don't try to do that at home

D. the dissolution of metallic sodium is exothermic

Explanation:

because sodium is a higly reactive metal which react vigorously with water to form sodium hydroxide and it releases high amount of energy, which can be explosive sometimes.

so/ the dissolution of metallic sodium is exothermic.

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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