How much energy is required to dissociate one mole of H 2 molecule?

Question

How much energy is required to dissociate one mole of H 2 molecule? (A) 435.8 kJ mol -1 (B) 435.8 J mol -1 (C) 345.8 kJ mol -1 (D) 345.8 J mol -1

Tardigrade Admin · Accepted Answer

Energy gets released when bond is formed between two hydrogen atoms, the H 2 molecule is more stable than isolated H atoms. The energy so released is called bond enthalpy which corresponds to minimum in the potential energy curve for the formation of H 2 molecule. Conversely 435.8 kJ energy is required to dissociate 1 mole of H 2 molecule.

Q. How much energy is required to dissociate one mole of $H_{2}$ molecule?

$435.8 k J m o l^{- 1}$

$435.8 J m o l^{- 1}$

$345.8 k J m o l^{- 1}$

$345.8 J m o l^{- 1}$

Q. How much energy is required to dissociate one mole of H2​ molecule?

435.8kJmol−1

435.8Jmol−1

345.8kJmol−1

345.8Jmol−1

Q. How much energy is required to dissociate one mole of $H_{2}$ molecule?

$435.8 k J m o l^{- 1}$

$435.8 J m o l^{- 1}$

$345.8 k J m o l^{- 1}$

$345.8 J m o l^{- 1}$