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Which law of thermodynamics help in calculating entropy at different temperatures?

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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 $2 H_{2} (g) + O_{2} (g) \to 2 H_{2} O (l)$ at $300 K$ when $S_{H_{2}} ° (g) = 126.6, S_{O_{2}} ° (g) = 201.20$

$S_{H_{2} O} ° (I) = 68.0 {JK}^{- 1} {mol}^{- 1}$ respectively is

EASY

Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics

Third law of thermodynamics is used to determine the

MEDIUM

Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics

Which law of thermodynamics helps in calculating entropy at different temperatures?

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

N_{2} (g), H_{2} (g)

and

{NH}_{3} (g)

are

191.5, 130.5, 192.6 {JK}^{- 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 C_p,m = aT³ , where 'a' is constant. If C_p,m is

0.42 \frac{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

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

HARD

Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics

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

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 \to 0

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

0 K

, entropy becomes:

MEDIUM

Chemistry>Physical Chemistry>Thermodynamics>Third Law of Thermodynamics

Identify the correct statement regarding entropy.

Which law of thermodynamics help in calculating entropy at different temperatures?

Important Questions on Thermodynamics

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