CameraIcon

SearchIcon

MyQuestionIcon

1

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

Gibbs Free Energy & Spontaneity

The free ener...

Question

The free energy for a reaction having $Δ H = 31400 c a l, Δ S = 32 c a l K^{- 1} {m o l}^{- 1}$ at $1000^{o} C$ is:

A

- 9336 c a l

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

B

- 7386 c a l

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

C

- 1936 c a l

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

D

+ 9336 c a l

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

Open in App

Solution

The correct option is A $- 9336 c a l$
We have,
$Δ G = Δ H - T Δ S$
$Δ G = 31400 - 1273 * 32 = - 9336 c a l$

Suggest Corrections

thumbs-up

0

Similar questions

Q. A change in the free energy of a system at constant temperature and pressure will be:

Δ_{s y s} G = Δ_{s y s} H - T Δ_{s y s} S

At constant temperature and pressure

Δ_{s y s} G < 0 (s p o n t a n e o u s)

Δ_{s y s} G = 0 (e q u i l i b r i u m)

Δ_{s y s} G > 0 (n o n - s p o n t a n e o u s)

The free energy for a reaction having

Δ H = 31400 c a l

Δ S = 32 c a l K^{- 1} m o l^{- 1}

1000^{\circ} C

Q. The Gibbs free energy change for the reaction for which

Δ H = - 393.4 k J

Δ S = - 2.9 {J K}^{- 1} {m o l}^{- 1}

Q. At 1 atm pressure, for a reaction ΔH=+30.558 kJ mol−1 and ΔS=0.066 kJ mol−1. The temperature at which free energy is equal to zero and the nature of the reaction below this temperature is:

Q. For the reaction,

{A g}_{2} O (s) ⇌ 2 A g (s) + \frac{1}{2} O_{2} (g)

Δ H, Δ S, Δ T

40.63 k J {m o l}^{- 1}, 1.808 J K^{- 1} {m o l}^{- 1}

373.4 K

respectively. Free energy change

Δ G

of the reaction will be:

Q. For a given reaction,

Δ H = 35.5 k J {mol}^{- 1}

Δ S = 83.6 k J {mol}^{- 1}

. The reaction is spontaneous at : (Assume that

Δ H

Δ S

) do not vary with temperature)

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Gibbs Free Energy

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Gibbs Free Energy & Spontaneity

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon