# Thermodynamics: Study of the Relations Between Heat, Work, Temperature, and Energy

In this quiz, you will find questions related to thermodynamics, laws of thermodynamics, heat exchange, conversion of energy, etc.

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Equilibrium state of a thermodynamic system is described by path variables. True or False?

True False

For any gas the equation is state is PV=nRT. True or False?

True False

Which of the following variables is intensive?

Internal energy volume Temperature Total mass

Which of the following is an extensive variable?

Volume Pressure Boiling point Color

The product of an extensive and intensive variable is?

Extensive Intensive Depends on temperature conditions Depends on pressure conditions

The temperatures of inside and outside of a refrigerator are 273 K and 303 K respectively. Assuming, that the refrigerator cycle is reversible, for every joule of work done, the heat delivered to the surrounding will be nearly:

10 J 20 J 30 J 50 J

An engine has an efficiency of 1/6. When the temperature of sink is reduced by 62°C, its efficiency is doubled. Temperature of the source is:

124°C 37°C 62°C 99°C

A black body at a temperature of 227°C radiates heat at the rate of 20 cal m-2s-1. When its temperature rises to 727°C, the heat radiated will be

40 units 160 units 320 units 640 units

Directions: The following question has four choices out of which ONLY ONE is correct. Which of the following is incorrect regarding the first law of thermodynamics? A. It is not applicable to any cyclic process B. It is a restatement of the principle of conservation of energy C. It introduces the concept of the internal energy D. It introduces the concept of the entropy

A and D B and C C and A A and B

A system X is neither in thermal equilibrium with Y nor with Z. The systems Y and Z

May be in thermal equilibrium

None of all

Cannot be in thermal equilibrium

Must be in thermal equilibrium

Which of the following macroscopic variable is not measurable?

None of all

Volume

Pressure

Mass

Which of the following is a state variable ?

Internal energy

Heat

Work

All of these

The internal energy of an ideal gas depends upon

Temperature

Specific volume

Pressure

Density

First law of thermodynamics states that

Heat is a form of energy

System has pressure

System has temperature

System can do work

At a given volume and temperature, the pressure of a gas

Varies inversely as its mass

Varies inversely as the square of its mass

Varies linearly as its mass

Is independent of its mass

Quiz/Test Summary
Title: Thermodynamics: Study of the Relations Between Heat, Work, Temperature, and Energy
Questions: 15
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