Chemical Thermodynamics (NEET Chemistry): Questions 23 - 28 of 51

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Question number: 23

» Chemical Thermodynamics » State Functions » Entropy

MCQ▾

Question

Calculate the entropy change when 1 mole of nitrogen gas expands isothermally and reversibly from an initial volume of 1 liter to a final volume of 10 liter at 27°C?

Choices

Choice (4) Response

a.

19.12 J/K

b.

1.912 J/K

c.

-19.12 J/K

d.

-1.912 J/K

Question number: 24

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpies of Bond

MCQ▾

Question

Which of the following acid will release maximum amount of heat when completely? Neutralized by strong base NaOH?

Choices

Choice (4) Response

a.

1MH 2SO 4

b.

1MHNO 3

c.

1MHCl

d.

1MHclO 4

Question number: 25

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

MCQ▾

Question

Predict then following reaction for spontaneity

SOCl 2 + H 2O → SO 2 + 2HCl

The enthalpy of the reaction is 49.4 k J and entropy reaction is 336 J/K and calculate ∆ G?

Choices

Choice (4) Response

a.

-52 k J

b.

52 k J

c.

-51.4 k J

d.

51.4 k J

Question number: 26

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

MCQ▾

Question

Calculate the enthalpy change for following reaction?

CH 4 (g) + 2O 2 (g) → CO 2 (g) + 2H 2 O (l)

Given enthalpies of formation of CH 4, CO 2, H 2O are -74.8 J/mol, -393.5 KJ/mol, -286.2KJ/mol

Choices

Choice (4) Response

a.

89.1 KJ

b.

-89.1 KJ

c.

-891.1 KJ

d.

891.0KJ

Question number: 27

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

MCQ▾

Question

The calorific value of methane is?

Choices

Choice (4) Response

a.

-150 KJ/g

b.

-48 KJ/g

c.

-33 KJ/g

d.

-55.6 KJ/g

Question number: 28

» Chemical Thermodynamics » First Law of Thermodynamics » Work

MCQ▾

Question

5 moles of an ideal gas at 27°C expands isothermally and reversibly from a volume of 6L to 60 L. The work done in k J is?

Choices

Choice (4) Response

a.

-56.72

b.

-14.7

c.

-28.72

d.

28.72

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