CameraIcon

SearchIcon

MyQuestionIcon

1

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

Enthalpy

For N 2 g +2 ...

Question

For $N_{2} (g) + 2 H_{2} (g) ⇌ 2 N H_{3} (g)$ , $Δ H$ is equal to:

A

Δ U + 2 R T

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

Δ U - 2 R T

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

C

Δ U - R T

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

Δ U + R T

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $Δ U - 2 R T$
We know, $Δ H = Δ U + Δ n_{g} R T$
where $Δ H$ = change in enthalpy of the reaction
$Δ U$ = Change in internal energy
$Δ n_{g}$ = difference in moles of products and reactants = $2 - 4 = - 2$
$Δ H$ = $Δ U - 2 R T$

Suggest Corrections

thumbs-up

0

Similar questions

2 S O_{2} (g) + O_{2} (g) \to 2 S O_{3} (g)

Δ H

For the reaction, N₂ + 3H₂ ⇌ 2NH₃, ∆H= …………….

Q. For the reaction,

N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g), △ H

is equal to :
(

△ U

= change in internal energy)

Q. Match List I with List II and select the answer from the given codes
List I List II
A.

C (s) + O_{2} (g) ⟶ C O_{2} (g)

Δ H = Δ U + R T

N_{2} (g) + 3 H_{2} (g) ⟶ 2 N H_{3} (g)

Δ H = Δ U

N H_{4} H S (s) ⟶ N H_{3} (g) + H_{2} S (g)

Δ H = Δ U - 2 R T

P C l_{5} (g) ⟶ P C l_{3} (g) + C l_{2} (g)

Δ H = Δ U + 2 R T

2 S O_{2} (g) + O_{2} (g) ⟶ 2 S O_{3} (g)

Δ H = Δ U - R T

Q. Match List I with List II and select the answer from the given codes.

C (s) + O_{2} (g) ⟶ C O_{2} (g)

Δ H = Δ U + R T

N_{2} (g) + 3 H_{2} (g) ⟶ 2 N H_{3} (g)

Δ H = Δ U

N H_{4} H S (s) ⟶ N H_{3} (g) + H_{2} S (g)

Δ H = Δ U - 2 R T

P C l_{5} (g) ⟶ P C l_{3} (g) + C l_{2} (g)

Δ H = Δ U + 2 R T

2 S O_{2} (g) + O_{2} (g) ⟶ 2 S O_{3} (g)

Δ H = Δ U - R T

View More

Join BYJU'S Learning Program

explore_more_icon

Explore more

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon