Hydrogen And Its Compounds Question 124

Question: The conversion of atomic hydrogen into ordinary hydrogen is

Options:

A) Exothermic change

B) Endothermic change

C) Nuclear change

D) Photochemical change

Show Answer

Answer:

Correct Answer: A

Solution:

$ 2H $ ⇌ $ H_2 $ ; $ \Delta H=-104.5kcal $