EASY

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Statement $I$ : Internal energy of a system is an extensive property.

Statement $II$ : The internal energy of a system depends upon the amount and physical state of the substance.

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Important Questions on Thermodynamics

EASY

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

Write features of reversible process.

EASY

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

Thermodynamic properties are divided into two broad types: intensive properties and extensive properties. Which of the following is NOT an intensive property?

EASY

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

Which of the following is not an intensive property?

MEDIUM

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

Consider a cyclic process

P \to Q \to R \to P

for a system. Among the following, the combination of steps that can never lead to this cyclic process is

EASY

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

Identify the correct set of intensive properties from the following

HARD

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

Three separate reversible processes

(1, 2 and 3)

are carried out with

1

mole of an ideal gas initially at STP. In these processes, the pressure (

P

) is measured while increasing any one of the quantities volume (

V

), temperature (

T

) and number of moles

(n)

, keeping the other two constant. Plots of

P (atm)

versus

X

are found to be linear, where

X = n

T (K)

1 / V ({lit}^{- 1})

. For the processes

1, 2

and

3

, the numerical values of the slopes

m_{1}, m_{2}

and

m_{3}

of the

P

versus

X

plots are found to follow the order

m_{1} > m_{2} > m_{3}

, respectively. The correct statement(s) about these processes is/are

EASY

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

Which of the following options is an intensive property of a system?

MEDIUM

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

The total number of intensive properties from the following is _____.
Volume, Molar heat capacity, molarity, $E_{cell}^{o}$ ,Gibbs free energy change, Molar mass, Mole

EASY

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

Among the following, the extensive variables are

MEDIUM

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

During a reversible adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio

\frac{C_{p}}{C_{V}}

for the gas is

MEDIUM

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

When

5

moles of

He

gas expand isothermally and reversibly at

300 K

from

10

litres to

20

litres, the magnitude of the maximum work obtained in

J

is . [nearest integer ] (Given :

R = 8.3 J K^{- 1} {mol}^{- 1}

and

\log 2 = 0.3010

)

EASY

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

In a closed insulated container, a liquid is stirred with a paddle to increase its temperature. In this process, which of the following is true?

EASY

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

Among the following the number of state variable is

Internal energy $(U)$

Volume $(V)$

Heat $(q)$

Enthalpy $(H)$

EASY

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

Define:
Reversible process

EASY

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

Observe the following properties:

Volume, enthalpy, density, temperature, heat capacity, pressure, internal energy.

The number of extensive properties in the above list is

MEDIUM

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

The qualitative sketches I, II and III given below show the variation of surface tension with molar concentration of three different aqueous solutions of KCl,

C H_{3} O H

and

C H_{3} {(C H_{2})}_{11} O S O_{3}^{-} N a^{+}

at room temperature. The correct assignment of the sketches is -

Question Image

EASY

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

A piece of ice falls from a height

h

so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of

h

is:
(Latent heat of ice is

3.4 \times 10^{5} {J kg}^{- 1}

and

g = 10 {N kg}^{- 1}

)

EASY

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

For an adiabatic change in a system, the condition which is applicable will be

EASY

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

Which of the following is NOT an intensive property?

EASY

Chemistry>Physical Chemistry>Thermodynamics>Terminology in Thermodynamics

Among the following, the set of parameters that represents path functions, is:
i)

q + w

ii)

q

iii)

w

iv)

H - T S

Statement I: Internal energy of a system is an extensive property. Statement II: The internal energy of a system depends upon the amount and physical state of the substance.

Important Questions on Thermodynamics

Learn and Prepare for any exam you want !

Statement $I$ : Internal energy of a system is an extensive property.

Statement $II$ : The internal energy of a system depends upon the amount and physical state of the substance.