MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Enthalpy

Bond dissocia...

Question

Bond dissociation enthalpies of $H_{2} (s)$ and $N_{2} (g)$ are $436.0 k J {m o l}^{- 1}$ and enthalpy of formation of ${N H}_{3} (g)$ is $- 46 k J {m o l}^{- 1}$ . What is enthalpy of atomization of ${N H}_{3} (g)$ ? What is the average bond enthalpy of $N - H$ bond?

Open in App

Solution

$N_{2} (g) + 3 H_{2} (g) ⟶ 2 {N H}_{3} (g); Δ H = - 2 \times 46 k J / m o l$
$Δ H = \sum {(B E)}_{R} - \sum {(B E)}_{P} = (941.8 + 3 \times 436) - (6 x) = - 2 \times 46$
(here $x = B E$ of N-H bond)
$x = 390 k J {m o l}^{- 1}$
${N H}_{3} ⟶ N + 3 H$
Heat of atomization $= 3 \times 390.3 = 1170.9 k J {m o l}^{- 1}$

Suggest Corrections

thumbs-up

0

Similar questions

Q. Bond dissociation enthalpies of

H_{2} (g)

N_{2} (g)

{m o l}^{- 1}

{m o l}^{- 1}

and enthalpy of formation of

{N H}_{3} (g)

{m o l}^{- 1}

. What is enthalpy of atomization of

{N H}_{3} (g) ?

What is average bond enthalpy of

N - H

Q. Bond dissociation enthalphies of

H_{2} (g)

N_{2} (g)

k J m o l^{- 1}

k J m o l^{- 1}

respective enthalpy of formation of

N H_{3} (g)

- 46 k J m o l^{- 1}

. What is enthalpy of atomization of

N H_{3} (g)

?

Q. Bond dissociation enthalpies of

H_{2_{(} g)}

N_{2_{(} g)}

K J

m o l^{- 1}

K J

m o l^{- 1}

, respectively and enthalpy of formation of

N H_{3_{(} g)}

- 46 K J

m o l^{- 1}

What is the enthalpy of atomization of

N H_{3_{(} g)}

and the average bond enthalpy of

N - H

bond respectively (in

K J

m o l^{- 1}

Q. Bond dissociation enthalphies of

H_{2} (g)

N_{2} (g)

m o l^{- 1}

m o l^{- 1}

respectively and enthalpy of formation of

N H_{3} (g)

m o l^{- 1}

. What is enthalpy of atomization of

N H_{3} (g)

?

Q. Bond dissociation enthalpies of

H_{2} (g) a n d N_{2} (g)

436.0 k J m o l^{- 1}

941.3 k J m o l^{- 1}

respectively. Enthalpy of formation of

N H_{3}

- 46.0 k J m o l^{- 1}

. What is the enthalpy of atomization of

N H_{3}

.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Enthalpy

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon