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The third law of thermodynamics states that, the entropy of a perfect crystal at a temperature of zero degree Celsius is equal to zero.

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Important Questions on Thermodynamics

EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
Third law of thermodynamics is used to determine the
HARD
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
State third law of thermodynamics. What is its usefulness?
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
Which law of thermodynamics help in calculating entropy at different temperatures?
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
The law formulated by Nernst is
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
At what temperature is the entropy of a perfectly crystalline substance taken as zero?
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
Which of the following allotropes of sulphur has maximum S at 0° K?
MEDIUM
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
The true statement amongst the following is
HARD
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
For a perfectly crystalline solid Cp,m = aT3 , where 'a' is constant. If Cp,m is 0.42  J K mol at 10 K, molar entropy at 20 K is :
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
State the third law of thermodynamics.
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
The entropy of a perfectly crystalline material is zero at 0 K. This is statement of
MEDIUM
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
According to the third law of thermodynamics, which one of the following quantities for a perfectly crystalline solid is zero at absolute zero?
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
Write statement for the IIIrd law of thermodynamics?
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics

Identify the correct statement regarding entropy:

                               

EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
The third law of thermodynamics states that in the limit T→0,
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
The entropy of a perfectly crystalline material is zero at 0 K. This statement matches with the-
MEDIUM
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
Why is it impossible for any substance to have an absolute entropy zero at temperature greater than 0 K?
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
Cotyledons are also called-
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
Entropy is a measure of disorder. For perfect crystalline substances at 0K, entropy becomes:
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
Identify the correct statement regarding entropy.
MEDIUM
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
Identify the correct statement regarding entropy.