Thermodynamics Flashcards

1
Q

Which law is the basis for the manufacture of thermometers?
a. Boyle’s Law c. Zeroth Law of Thermodynamics
b. Raoult’s Law d. Carnot’s Principle

A

c. Zeroth Law of Thermodynamics

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2
Q

Energy is added to the water as work but is extracted from the water
as heat was performed by
a. Van ness c. Joule
b. Fitzer d. Smith

A

c. Joule

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3
Q

These properties depend on the current state of the system and not
on how the system reaches that state.
a. path functions c. excess property
b. state functions d. all of these

A

b. state functions

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4
Q

Which of the following statement is correct?
a. The standard heat of formation of an element is negative.
b. Since △H = △U + △PV and can never be equal to △U.
c. Q and W are state functions.
d. Q + W is a state function.

A

d. Q + W is a state function.

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5
Q

The amount of heat absorbed when CO2 gas reacts with a solid CaO
to form solid CaCO3 is measured in a bomb calorimeter at constant
volume. The data obtained give a direct measure of
a. △U c. △H
b. V△P d. Cp

A

a. △U

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6
Q

For a constant pressure reversible process, the enthalpy (∆H)
change of the system is
a. C vdT c. CpdT
b. ∫CpdT d. ∫CvdT

A

b. ∫CpdT

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7
Q

Cv is given by
a. (∂U/ ∂T)v c. (∂U/∂V)T
b. (∂U/∂P)v d. (∂V/ ∂T)P

A

a. (∂U/ ∂T)v

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8
Q

Equation which relates pressure, volume, and temperature of a
gas is called
a. Equation of state
b. ideal gas equation
c. Gibbs Duhem equation
d. all of these

A

a. Equation of state

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9
Q

The equation, PV = nRT is best obeyed by gases at
a. low pressure and high temperature
b. high pressure and low temperature
c. low pressure and low temperature
d. high pressure and high temperature

A

a. low pressure and high temperature

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10
Q

Compressibility factor of a gas is
a. not a function of pressure
b. not a function of its nature
c. not a function of its temperature
d. unity, if it follows PV = nRT

A

d. unity, if it follows PV = nRT

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11
Q

Cp – Cv = R is valid for
a. ideal gases
b. all gases
c. gases at very high pressure
d. gases at a very low temperature

A

a. ideal gases

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12
Q

For monoatomic gases, Cp / Cv equals
a. 1.0 c. 1.3
b. 1.4 d. 1.67

A

d. 1.67

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13
Q

Isobaric process means a constant
a. temperature process c. pressure process
b. volume process d. entropy process

A

c. pressure process

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14
Q

For an isothermal process the internal energy of a gas
a. increases
b. decreases
c. remains unchanged
d. data insufficient can’t be predicted

A

c. remains unchanged

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15
Q

In an adiabatic process
a. heat transfer is zero
b. temperature change is zero
c. work done is a path function
d. enthalpy remains constan

A

a. heat transfer is zero

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16
Q

From PVn = C, when n = 0, the process is
a. isochoric c. polytropic
b. isothermal d. isobaric

A

d. isobaric

17
Q

From PVn = C, the process is isochoric if n equals
a. 0 c. 1
b. δ d. ∞

A

d. ∞

18
Q

Work output of turbine is __ the work input to the pump
a. less than
b. equal to
c. greater than
d. less than or greater than

A

c. greater than

19
Q

The efficiency of Carnot cycle is ___ the efficiency of Rankine
cycle.
a. less than c. equal to
b. greater than d. less than or greater than

A

b. greater than

20
Q

The losses in condenser are ___.
a. small c. always constant
b. large d. none of these

A

a. small