Chemical Thermodynamics Question 83

Question: Energy required to dissociate 4 gm of gaseous hydrogen into free gaseous atoms is 208 kcal at $ 25^{o}C $ . The bond energy of $ H-H $ bond will be [CPMT 1989; MP PET 2000; J & K 2005]

Options:

A) 104 kcal

B) 10.4 kcal

C) 1040 kcal

D) 104 cal

Show Answer

Answer:

Correct Answer: A

Solution:

$ 4g,H_2=2 $ moles. Bond energy for 1 mole of $ H_2=208/2=104kcal. $



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