Question # 1

Internal energy of a gas decreased when

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It gains heat

Change in cycle

Change in adiatatic

Change in reversible

Which law states that two given samples of an ideal gas at the same temperature pressure and volume contain the same number of molecules.

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Charles law

Avogadro's

Boyles law

Boizmann law

Real gases obey gas laws only at

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Low pressure and high temperature

High pressure and low temperature

High pressure and high temperature

Low pressure and low temperature

The base unit of temperature in SI is

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Fahrenheit

Celsius

Kelvin

Rnakine

A heat engine can develop efficiency equal to 100% if the temperature of the sink is

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Less than that of source

Equal to that of source

0 K

0 ^oC

The process in which no heat enters or leaves the system is called.

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Isdobaric

Isochoric

Isothermal

Adiabatic

The Fahrenheit and Kelvin scales intersect at

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40

-40

140

-140

Thermodynamics concern its primary with the

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Measurement of quantity of heat

Physical effects of temperature changes

Conversion of heat into other energy forms

Behavior of gases

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

The expression PV/KT represents.

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Number of moles of the gas

Number of molecules in the gas

Total mass of the gas

Density of the gas

What kind of movement is dictated by the laws of thermodynamcis.

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Energy motion

Heat work

Light heat

Energy light

In the free expansion of a perfect gas there is no.

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work done

Heat exchnged

Internal energy changed

All of the above

By definition a gas is said to be have undergone adiabatic compressing when

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No heat exchange occurs between the gas and its surroundings

The gas is compressed quickly

The gas is compressed slowly

The temperature of the gas remains constant

How much lce will melt by 50,000 J of heat.

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120 J

130 g

140 J

150 g

If the specific latent heat of vaporization of oxygen is 214 kJ kg-1 how much heat will be absorbed when 3.0 kg of oxygen is boiled off at its boiling point.

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14 kJ

64 k J

140 kJ

642 k j

In general work done on or by a gas depends on.

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The initial state only

The final state only

The initial and final states

The initial state the final state and the path

If two gases have same reduced pressure volume and temperature it is according to

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Boyle's law

Charles law

Law of corresponding state

Zeroth law

In which given process does the system always return to the original thermodynamic state.

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Cyclic

Adiabatic

isothermal

Isobaric

Which is the heat transfer mode between an object and its environment due to circular fluid motion.

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Conduction

Convection

Radiation

Mass transfer

Gas law PV = constant is for

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Adiabatic change

Isothermal changes

Isobaric changes

Isochoric changes

Which of the following is an example of an irreversible process.

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Isothermal and adiabatic process

Melting of ice

Work done against friction

Pettier effect

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