Thermodynamics Quiz

Heat and work are:

• Extensive properties

• Intensives properties

• Point function

• Path function

According to which law, "it is impossible to reduce any system to absolute zero in temperature in a finite number of processes."

• The second law of thermodynamics

• The first law of thermodynamics

• The third law of thermodynamics

• None of the above

Carnot cycle consists of

• Two constant volumes and two isentropic processes

• Two isothermal and two isentropic processes

• Two constant pressure and two isentropic processes

• One constant volume, one constant pressure and two isentropic processes

Which of the following states, "it is impossible, by any means, to reduce any system to the absolute zero of temperature in a finite number of operations"?

• Clausius statement of II law

• Kelvin-Planck's statement of II law

• Fowler-Guggenheim statement of III law

• Carnot theorem

The third law of thermodynamics:

• Introduces the principle of increase of entropy

• Throws light on concepts of internal energy

• Establishes a concept of temperature

• Defines the absolute zero of entropy

A polyatomic ideal gas undergoes a reversible adiabatic process such that VT3=constant. Find the value of such that P=T4

• Y=sin(90)

• Y=cos60

• Y=tan(53)

• Y=3sin(90)

Assertion ( A): work done in an isothermal expansion is greater than in an adiabatic expansion for the same initial and final volume

Reason (R) : in an adiabatic expansion, temperature decreases, lowering pressure faster

• Both A and R are true, and R correctly explains A

• Both A and R are true, and R doesn't correctly explain A

• A is true but R is false

• A is false but R is true

An ideal gas initially at pressure Pi undergoes the following sequence of processes:

1.  A reversible adiabatic expansion that doubles its volume

2.  A reversible isothermal compression that restores its original volume

3. A reversible isothermal expansion that doubles its volume

4. A reversible adiabatic compression that restores its original volume

If the final pressure of the gas is Pf, which the following is true?

• Pf=Pi

• Pf > Pi

• Pf < Pi

• The Relation between Pf and Pi depends on the initial conditions

The internal energy of air in 4m x 4m x 3m sized room at 1 atm pressure will be …. X10^6 J (consider air as diatomic molecule)

• 12

• 10

• 8

• 6

Identify the characteristics of an adiabatic process in a monoatomic gas.

1. Internal energy is constant

2. Work done in the process is equal to the charge in internal energy

3. The product of temperature and volume is a constant

4. The product of pressure and volume is a constant

5. The work done to change the temperature from T1 to T2 is proportional to (T2-T1)

Choose the correct answer from the option given below:

• 1, 3, 4 only

• 1, 3, 5 only

• 2, 5 only

• 2, 4 only