Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-II (Previous Year Questions)>Q 45

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For gas ' $A$ ' in a calorimeter heat evolved is $250 kJ {mol}^{- 1}$ . For $0.2 mol$ of $A$ , temperature rise from $298 K$ to $300 K .$ Find out heat capacity of calorimeter:-

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Important Questions on Thermodynamics

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-II (Previous Year Questions)>Q 46

For a given reaction,

ΔH = 35.5 kJ {mol}^{- 1}

and

ΔS = 83.6 {JK}^{- 1} {mol}^{- 1}

.The reaction is spontaneous at :(Assume that

ΔH

and

ΔS

do not vary with temperature)

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-II (Previous Year Questions)>Q 47

A gas is allowed to expand in a well-insulated container against a constant external pressure of

2.5 atm

from an initial volume of

2.50 L

to a final volume of

4.50 L .

The change in internal energy

ΔU

of the gas in joules will be

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-II (Previous Year Questions)>Q 48

For an isolated system:

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-II (Previous Year Questions)>Q 50

The heat of combustion of

C_{4} H_{10}

is

- 2878 kJ

{mol}^{- 1}

. If the heats of formation of

{CO}_{2}

and

H_{2} O

are

- 393.5 kJ {mol}^{- 1}

and

- 285.8 kJ {mol}^{- 1}

then the heat of formation of

C_{4} H_{10}

is :-

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-II (Previous Year Questions)>Q 51

During adiabatic expansion of an ideal gas in vacuum :-

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-II (Previous Year Questions)>Q 52

The bond dissociation energies of

X_{2}, Y_{2} & XY

are in the ratio of

1 : 0.5 : 1

.

∆ H

for the formation of

XY

is

- 200 kJ {mol}^{- 1}

. The bond dissociation energy of

X_{2}

will be

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-II (Previous Year Questions)>Q 53

Which of the following pair is an example of extensive property?

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Beta Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>EXERCISE-II (Previous Year Questions)>Q 54

An ideal gas expands from

2 L

to

10 L

adiabatically against a constant external pressure of

10 atm

. Then find the change in internal energy: