Chemical Thermodynamics-Second Law of Thermodynamics (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Chemistry): Questions 1 - 5 of 8

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Question number: 1

» Chemical Thermodynamics » Second Law of Thermodynamics

Appeared in Year: 2014

MCQ▾

Question

The latent heat melting of ice at 0°C is 6KJmol1 the entropy change during the melting in JK1mol1 is closest to

Choices

Choice (4) Response
a.

11

b.

- 22

c.

22

d.

- 11

Question number: 2

» Chemical Thermodynamics » Second Law of Thermodynamics » Introduction

Appeared in Year: 2013

MCQ▾

Question

The entropy change in the isothermal reversible lypansion of 2 moles of an ideal gap from 10Lto100L at 300K is:

Choices

Choice (4) Response
a.

32.3Jk1

b.

38.3Jk1

c.

42.3Jk1

d.

35.8Jk1

Question number: 3

» Chemical Thermodynamics » Second Law of Thermodynamics

MCQ▾

Question

When 100 g of water is reversibly heated from 50to75 at 1 atm, the change in entropy J/K of the universe is:

Choices

Choice (4) Response
a.

0.31

b.

0

c.

– 0.31

d.

3.1

Question number: 4

» Chemical Thermodynamics » Second Law of Thermodynamics

MCQ▾

Question

If 900Jg1 of heat is exchanged at boiling point of water, then what is increase in entropy?

Choices

Choice (4) Response
a.

900JK1mol1

b.

0JK1mol1

c.

43.4JK1mol1

d.

87.2JK1mol1

Question number: 5

» Chemical Thermodynamics » Second Law of Thermodynamics » Standard Gibbs Energy Change

MCQ▾

Question

For hypothetical reversible reaction

12A2(g)+32B2(g)AB3;H=20kJ

If standard entropies of A2,B2andAB3are60,40and50JK1mol1 respectively. The above reaction will be in equilibrium at -

Choices

Choice (4) Response
a.

400 K

b.

200 K

c.

500 K

d.

250 K

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