Chemical Thermodynamics (NEET Chemistry): Questions 29 - 34 of 50

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Question number: 29

» Chemical Thermodynamics » State Functions » Internal Energy

MCQ▾

Question

Which of the following unit represents largest amount of energy?

Choices

Choice (4) Response

a.

Carrie

b.

Erg

c.

Electron volt

d.

Joule

Question number: 30

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

MCQ▾

Question

The bond energies of C = C and C-C at 298K are 590 and 331 KJ/mol respectively. The enthalpy of polymerization per mole of ethylene is?

Choices

Choice (4) Response

a.

72 KJ

b.

-72 KJ

c.

-68 KJ

d.

-70 KJ

Question number: 31

» Chemical Thermodynamics » State Functions » Entropy

MCQ▾

Question

The enthalpy change, for the transition of liquid water to steam, ∆ H vapour is 40.8 KJ/mol at 373K. Calculate the entropy change for process?

Choices

Choice (4) Response

a.

109.38J/Kmol

b.

10.938J/Kmol

c.

10.938J/Kmol

d.

109.38 J/K m o l

Question number: 32

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

MCQ▾

Question

When an ideal gas compressed adiabatically and reversibly, the final temperature is?

Choices

Choice (4) Response

a.

Same as the initial temperature

b.

Lower than the initial temperature

c.

Higher than the initial temperature

d.

Depend on rate of compression.

Question number: 33

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

MCQ▾

Question

The bond dissociation energies of gaseous H 2, Cl 2, and HCL are 104, 58 and 103 kcal/mol respectively. Calculate the enthalpy of formation of HCl (g)?

Choices

Choice (4) Response

a.

42 kcal/mol

b.

22 kcal/mol

c.

-22 klcal/mol

d.

-42kcal/mol

Question number: 34

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

MCQ▾

Question

Thermodynamic state quantity which is a measure of randomness or disorder of molecules of the system?

Choices

Choice (4) Response

a.

Entropy

b.

Work

c.

Enthalpy

d.

Heat capacity

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