Thermodynamic processes are indicated in the following diagram. Match the following Column – 1 Column - 2 P. Process I a. Adiabatic Q. Process II b. Isobaric R. Process III c. Isochoric S. Process IV d. Isothermal

P → c , Q → a , R → d , S → b

P → a , Q → c , R → d , S → b

P → c , Q → d , R → b , S → a

P → d , Q → b , R → a , S → c

Three different processes that can occur in an ideal monoatomic gas are shown in the P vs V diagram. The paths are labelled as A → B , A → C and A → D . The change in internal energies during these process are taken as E A B , E A C and E A D and the work done as W A B , W A C and W A D . The correct relation between these parameters are:

E A B = E A C = E A D , W A B > 0 , W A C = 0 , W A D < 0

E A B = E A C < E A D , W A B > 0 , W A C = 0 , W A D < 0

E A B < E A C < E A D , W A B > 0 , W A C > W A D

E A B > E A C > E A D , W A B < W A C < W A D

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Define various types of thermodynamic processes.

Important Questions on Thermodynamics

EASY

Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

Consider the following thermodynamical variables
(i) Pressure
(ii) Internal Energy
(iii) Volume
(iv) Temperature

Out of these, the intensive variable(s) is (are)

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Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

n

moles of an ideal gas undergoes a process

A \to B

as shown in the figure. The maximum temperature of the gas during the process will be:
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HARD

Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

A one mole of ideal gas goes through a process in which pressure

P

varies with volume

V

P = 3 - g {(\frac{V}{V_{0}})}^{2}

, where

V_{0}

is a constant. The maximum attainable temperature by the ideal gas during this process is (All quantities are in

SI

units and

R

is gas constant)

EASY

Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

2 kg

of a monoatomic gas is at a pressure of

4 \times 10^{4} N m^{- 2}

. The density of the gas is

8 kg m^{- 3}

. What is the order of energy of the gas due to its thermal motion?

EASY

Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

Pressure versus temperature graph of an ideal gas at constant volume $V$ is shown by the straight-line $A$ . Now mass of the gas is doubled and the volume is halved then the corresponding pressure versus temperature graph will be shown by the line

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MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

The Clausius-Clayperon equation helps to calculate

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Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

A system goes from $A$ to $B$ via two processes $I$ and $II$ shown in the figure. If $Δ U_{1}$ and $Δ U_{2}$ are the changes in internal energies in the processes I and Il respectively

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EASY

Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

One mole of an ideal diatomic gas undergoes a transition from $A$ to $B$ along a path $AB$ as shown in the figure,

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The change in internal energy of the gas during the transition is:

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Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

Consider the given diagram. An ideal gas is contained in a chamber (left) of volume $V$ and is at an absolute temperature $T .$ It is allowed to rush freely into the right chamber of volume $V$ which is initially vacuum. The whole system is thermally isolated. What will be the final temperature, if the equilibrium has been attained?

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EASY

Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

Which of the following statement is incorrect

MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

An ideal monoatomic gas occupies a volume of

2 m^{3}

at a pressure of

3 \times 10^{6} Pa .

The energy of the gas is:

EASY

Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

A balloon is filled at

27 ° C

and

1 atm

pressure by

500 m^{3}

He

. At

- 3 ° C

and

0.5 atm

pressure, the volume of

He

will be

EASY

Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

An ideal gas is compressed to half of its initial volume by means of several processes. Which of the process results in the maximum work done on the gas?

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Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

If system

A

is in thermal equilibrium with

B

and

B

is separately in thermal equilibrium with

C,

then

A

and

C

are in thermal equilibrium. From which thermodynamics law, does this follow?

MEDIUM

Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

One mole of diatomic ideal gas undergoes a cyclic process ABC as shown in figure. The process BC is adiabatic. The temperatures at A, B and C are 400 K, 800 K and 600 K respectively. Choose the correct statement :

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EASY

Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

Thermodynamic processes are indicated in the following diagram.

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Match the following

Column – 1	Column - 2
P. Process I	a. Adiabatic
Q. Process II	b. Isobaric
R. Process III	c. Isochoric
S. Process IV	d. Isothermal

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Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

N

moles of diatomic gas in a cylinder is at a temperature

T

. Heat is supplied to the cylinder such that the temperature remains constant but

n

moles of the diatomic gas get converted into monoatomic gas. The change in the total kinetic energy of the gas is

HARD

Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

A closed tank has two compartments A and B, both filled with oxygen (assumed to be ideal gas). The partition separating the two compartments is fixed and is a perfect heat insulator (Figure

1

). If the old partition is replaced by a new partition which can slide and conduct heat but does not allow the gas to leak across (Figure

2

), the volume (in

m^{3}

) of the compartment A after the system attains equilibrium is

\frac{20}{x} m^{3}

. Write the value of

x

EASY

Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

The pressure versus temperature graph of an ideal gas is shown in the figure below. If the density of gas at point $A$ is $ρ_{0}$ , then the density of the gas at point $B$ will be

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HARD

Physics>Heat and Thermodynamics>Thermodynamics>General Terms in Thermodynamics

Three different processes that can occur in an ideal monoatomic gas are shown in the $P$ vs $V$ diagram. The paths are labelled as $A \to B, A \to C$ and $A \to D$ . The change in internal energies during these process are taken as $E_{A B}, E_{A C}$ and $E_{A D}$ and the work done as $W_{A B}, W_{A C}$ and $W_{A D}$ . The correct relation between these parameters are:

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Define various types of thermodynamic processes.

Important Questions on Thermodynamics

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