Thermodynamics Test

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Thermodynamics Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

The apparatus used for measuring heat change is called

A
thermometer

B
voltameter

C
calorimeter

D
voltmeter
Question 2
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first law of thermodynamics is a restatement of

A
law of conservation of parity

B
law of conservation of energy

C
law of conservation of charge

D
law of conservation of mass

Solution

It is restatement of law of conservation of energy.
It states that Thermodynamics isthe branch of physical science that deals with the relations between heat and other forms of energy (such as mechanical, electrical, or chemical energy), and, by extension, of the relationships between all forms of energy.
Question 3
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Calorimetry is an experimental technique or process of

A
measuring the energy changes associated with chemical or physical processes.

B
measuring the amount of work done in a reaction

C
measuring the maximum pressure developed in a reaction

D
measuring the amount of chemicals consumed

Solution

Calorimetry is an experimental technique or process of measuring the heat of chemical reactions or physical changes as well as heat capacity.
Question 4
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Pressure on the system remains constant in

A
adiabatic process

B
isobaric process

C
isochoric process

D
reversible process
Question 5
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In a closed system, Which of the following take place ?

A
The boundaries prevent the flow of matter out of it but not vice versa

B
The boundaries prevent the flow of matter into or out of it.

C
The boundaries permit the flow of matter into or out of it

D
The boundaries permit the flow of matter into it but not vice versa.

Solution

In a closed system, there is no flow of matter from system to surrounding or vice versa.
For example, a certain quantity of fluid bounded within a closed cylinder constitutes a closed system.
Question 6
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Standard enthalpy of fusion or molar enthalpy of fusion is

A
The enthalpy change that accompanies vaporization of one kg of a solid substance in standard state

B
The enthalpy change that accompanies melting of one mole of a solid substance in standard state.

C
The enthalpy change that accompanies melting of one kg of a solid substance in standard state

D
The enthalpy change that accompanies vaporization of one mole of a solid substance in standard state

Solution

Molar enthalpy of fusion (always increases i.e. △H= positive) is the amount of energy needed to change completely one mole of a substance from the solid phase to the liquid phase in standard state.
Question 7
1 / -0

Two moles of helium gas is expanded isothermally and irreversibly at 27^oC from volume 1 dm³ to 1 m³ at a constant pressure of 100 kPa. Calculate the work done.

A
99900 kJ

B
99900 J

C
34464.65 kJ

D
34464.65 J
Question 8
1 / -0

Thermodynamics is the branch of physical science concerned with

A
kinetic energy and its transformations to and from other forms of energy

B
Potential and its transformations to and from other forms of energy

C
heat and its transformations to and from other forms of energy

D
mass and its transformations to and from other forms of energy

Solution

Thermodynamics deals with heat and its transformation from one form to another.
The branch of physical science that deals with the relations between heat and other forms of energy (such as mechanical, electrical, or chemical energy), and, by extension, of the relationships between all forms of energy.
Question 9
1 / -0

A tightly closed thermos flask contains some ice cubes. This is an example of

A
closed system

B
open system

C
isolated system

D
non-thermodynamic system
Question 10
1 / -0

Evaporation of water from a pond is an example of

A
isolated system

B
open system

C
closed system

D
homogeneous system

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Thermodynamics Test - 1

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Thermodynamics Test - 1

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Question 1

thermometer

voltameter

calorimeter

voltmeter

Question 2

law of conservation of parity

law of conservation of energy

law of conservation of charge

law of conservation of mass

Solution

Question 3

measuring the energy changes associated with chemical or physical processes.

measuring the amount of work done in a reaction

measuring the maximum pressure developed in a reaction

measuring the amount of chemicals consumed

Solution

Question 4

adiabatic process

isobaric process

isochoric process

reversible process

Question 5

The boundaries prevent the flow of matter out of it but not vice versa

The boundaries prevent the flow of matter into or out of it.

The boundaries permit the flow of matter into or out of it

The boundaries permit the flow of matter into it but not vice versa.

Solution

Question 6

The enthalpy change that accompanies vaporization of one kg of a solid substance in standard state

The enthalpy change that accompanies melting of one mole of a solid substance in standard state.

The enthalpy change that accompanies melting of one kg of a solid substance in standard state

The enthalpy change that accompanies vaporization of one mole of a solid substance in standard state

Solution

Question 7

99900 kJ

99900 J

34464.65 kJ

34464.65 J

Question 8

kinetic energy and its transformations to and from other forms of energy

Potential and its transformations to and from other forms of energy

heat and its transformations to and from other forms of energy

mass and its transformations to and from other forms of energy

Solution

Question 9

closed system

open system

isolated system

non-thermodynamic system

Question 10

isolated system

open system

closed system

homogeneous system

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