Question # 1

No entropy change is associated with

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Isothermal process

Adiabatic process

Isochoric process

Isoteric process

Which gas strictly obeys gas laws.

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Hydrogen gas

Inert gas

Ideal perfect gas

Helium gas

Specific heat a different substances varies becouse of

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Same number of molecules in unit mass

Different number of molecules in unit mass

Different K.E. of molecules in unit mass

Same K.E. of molecules in unit mass

In a vacuum flask the vacuum prevents heat transfer by

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Radiation only

Conduction only

Convection only

Conduction and convection

The gas thermometer is taken as the primary standard because.

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Thermometers are easily reproducible

Readings can be accurately taken

No correction are necessary

It produces he thermodynamic scale

Significant motion for the molecules of a monoatomic gas is.

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Rotatory

Vibratory

Translatory

Random

The average K.E. of the molecules of an ideal gas in a closed rigid container is increased by a factor of 4 What happen to the pressure of the gas.

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It remains the same

It increases by a factor of 2

It increases by a factor of 4

It increases by a factor of 8

What is the human body temperature in Celsius scale.

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30 oc

36. 9 oC

98. 4 oC

100 oC

The phenomenon of Brownian motion shows that

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Molecules exist and can be seen as bright dots moving about

Molecules moves about randomly at highs speeds

Smoke particles behaves as molecules

Smoke particles can be used as models of air molecues.

If a gas does 10 J of external work white expanding then the change in internal energy is equal to.

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0 J

10 J

-10 J

100 J

Which of the following devoices are used for measuring temperature.

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Thermocouples

Thermistors

Thermometers

All of these

The pressure necessary to liquify a gas at the critical temperature is called.

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Normal pressure

Atmospheric pressure

Critical pressure

Liquid pressure

Andrews isothermal helps to messure

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Boiling point

Boyle's temperature

Temperature of inversion

Critical temperature

When a liquid is hated retaining its liquid sate then its molecules gain.

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K.E.

P.E

Heat energy

Chemical energy

When a solid is melting the temperature remains constant even through heat is being supplied because the

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Heat is being used to break up the intermolecular bonds

Solid is not absorbing any heat

Molecules are moving faster

Molecules are farther a part

The specific heat of an ideal gas values as

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To

T1

T2

T3

Which law states that a change in the internal energy of a closed thermodynamic system is equal to the difference between the heat supplied to the system and teh amount of work by the system on the surrounding.

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Zeroth law of thermodynamics

First law of thermodynamics

Second law of thermodynamics

Third law of thermodynamics

In an isochoric process.

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Volume changes

Pressure changes

Temperature changes

Volume remains constant

Under steady state the temperature of a body

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Increase's with time

Decreases with time

Does not charge with time

None of the above

The amount of heat needed per unit mass to raise the temperature of a system one degree at constant pressure is numerically aqual to

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The specific heat

The specific thermal energy

The specific heat at constant pressure

the internal energy of the gas

To which law of thermodynamics, the concept of temperature is related to.

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Zeroth law

First law

Second law

Third law

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