EASY
Earn 100

Entropy is a measure of disorder. For perfect crystalline substances at 0K, entropy becomes:

42.86% studentsanswered this correctly

Important Questions on Thermodynamics

MEDIUM
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
The efficiency of a heat engine is given by
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics

Identify the correct statement regarding entropy:

                               

MEDIUM
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics

The ΔS for the reaction 2H2(g)+O2(g)→2H2O(l) at 300 K when SH2°(g)=126.6, SO2°(g)=201.20

SH2O°I=68.0JK-1 mol-1 respectively is

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

The entropy of a perfectly crystalline solid at absolute zero is:

EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
The law formulated by Nernst is
MEDIUM
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
The standard entropies of N2(g),H2(g) and NH3(g) are 191.5,130.5,192.6JK-1 mol-1. The value of ΔS° of formation of ammonia 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
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
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
Among the following, the reaction that is accompanied by a decrease in the entropy is
MEDIUM
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
Which law of thermodynamics helps in calculating entropy at different temperatures?
 
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
Identify the correct statement regarding entropy:
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
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
In actual practice, it is impossible to attain the low temperature (absolute zero). This lowering of temperature explains which law of thermodynamics?
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
Cotyledons are also called-
EASY
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
Which law of thermodynamics help in calculating entropy at different temperatures?
MEDIUM
Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics
Identify the correct statement regarding entropy.