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Enthalpy of Solution

At absolute z...

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At absolute zero temperature, entropy of all substance is zero(True or False)

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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. 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:

Q. The standard absolute entropy of a substance ,

(S^{⊖})

is the entropy of the substance in its standard state at

1

atm, temperature being :

According to third law of Thermodynamics, "At absolute zero, the entropy of a perfectly crystalline substance is taken as zero”.

Assertion(A): At absolute zero the entropy of a perfectly crystalline substance is taken as zero

Reason(R): At zero degree absolute the constituent particles become completely motionless

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