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 $