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Class XI Chemistry Thermodynamics 4: Entropy & Gibb's Energy

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Question 1

Standard entropy of X₂, Y₂ and XY₃ are 60, 40 and 50 J K^–1 mol^–1, respectively. For the reaction, , ΔH = –30 kJ, to be at equilibrium, the temperature (in K)will be

Question 2

For the following reaction,
$Description: Description: D:\GradeStack Courses\JEE Mains (Sent by Ravi)\JEE Mains Full Test\AIEEE-Full-Test-4-New_files\image006.png$ O₂(g) $Description: Description: D:\GradeStack Courses\JEE Mains (Sent by Ravi)\JEE Mains Full Test\AIEEE-Full-Test-4-New_files\image007.png$ O₃(g)
what will be the standard entropy change in the formation of ozone at 298K ?
(Given $Description: Description: D:\GradeStack Courses\JEE Mains (Sent by Ravi)\JEE Mains Full Test\AIEEE-Full-Test-4-New_files\image008.png$ cal/mole-deg and $Description: Description: D:\GradeStack Courses\JEE Mains (Sent by Ravi)\JEE Mains Full Test\AIEEE-Full-Test-4-New_files\image009.png$ cal/mole-deg)

Question 3

For a certain reaction X → Y the value of ΔH and ΔS are 50.50 kJ mol^–1 and 100.03 JK^–1 respectively. The temperature at which ΔG = 0 is–

Question 4

For the reaction
X₂O₄ (η) →2XO₂ (g) ΔE = 2.1 kcal,
ΔS = 20 cal/K at 300 K. Hence ΔG is–

Question 5

When one mole of uni-univalent salt AB is dissolved in water at 300 K, 3.7 kJ of heat is absorbed but ΔG of the process is – 8.3 kJ. What is the value of ΔS for the dissolution process ?

Question 6

Which of the following process/es proceed towards more disordered state?
I. stretching the
II. Sublimation of rubber dry ice
III. Crystallisation of
IV. dissolution of salt from solution sugar from solution

Question 7

When ice melts into water, entropy -

Question 8

In which of the following reactions ΔS is positive?

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