MyQuestionIcon

1

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

Entropy

The standard ...

Question

The standard absolute entropy of a substance , $(S^{⊖})$ is the entropy of the substance in its standard state at $1$ atm, temperature being :

A

298 K

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

B

273 K

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

C

398 K

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

D

0 K

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

Open in App

Solution

The correct option is A $298 K$
The standard entropy of a substance is its entropy at 1 atm pressure & 298K and expressed in units of $J K^{1} m o l^{1}$

Suggest Corrections

thumbs-up

0

Similar questions

Q. Assertion :Enthalpy and entropy of any elementary substance in their standard states are taken as zero.
Because Reason: At absolute zero, particles of the perfectly crystalline substance become completely ordered.

Q. Some statements are given with regard to entropy. The incorrect statement(s) is(are):

A) The absolute entropy of substances cannot be determined
B) In standard state entropy of elements is always positive
C) The entropy of the universe always decreases
D) In a spontaneous process, for an isolated system, the entropy of the system generally increases.

Q. Consider the following statements and arrange in the order of true/false as given in the codes.

S_{1}

: Unit of the molar entropy of a substance in SI system is Joule/ Kelvin.

S_{2}

: The Molar entropy of vaporization of ice is -ve.

S_{3}

: In an adiabatic free expansion, heat involved is zero and therefore entropy change will be zero.

S_{4}

: At absolute zero temperature, the entropy of a perfectly crystalline substance is zero.

Q. Which halogen in its standard state has the greatest absolute entropy per mole?

Q. Entropy is a measure of disorder. For perfect, crystalline substances at the coldest, imaginable temperature known as the zero degrees absolute, it is said that entropy becomes:

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Spontaneity and Entropy

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon