A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of 3 7 . 0 ∘ C . As it does so, it absorbs 208 J of heat. The values of q and w for the process will be (R = 8.314 J/mol K) (ln7.5 = 2.01)

q = + 2 0 8 J , w ⁡ = - 2 0 8 J

q = + 2 0 8 J , w ⁡ = + 2 0 8 J

q = - 2 0 8 J , w ⁡ = - 2 0 8 J

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Thermodynamics is concerned with:

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Important Questions on Chemical thermodynamics and energetics

EASY

Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to Thermodynamics

Among the following the number of state variable is

Internal energy $(U)$

Volume $(V)$

Heat $(q)$

Enthalpy $(H)$

EASY

Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to Thermodynamics

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

MEDIUM

Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to 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

)

MEDIUM

Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to 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>Chemical thermodynamics and energetics>Introduction to Thermodynamics

Identify the correct set of intensive properties from the following

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Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to 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>Chemical thermodynamics and energetics>Introduction to Thermodynamics

Which of the following is not an intensive property?

HARD

Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to Thermodynamics

The above

P - V

diagram represents the thermodynamic cycle of an engine, operating with an ideal mono-atomic gas. The amount of heat, extracted from the source in a single cycle, is:

MEDIUM

Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to 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

EASY

Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to Thermodynamics

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

HARD

Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to Thermodynamics

An ideal gas undergoes isothermal compression from

5 m^{3}

1 m^{3}

against a constant external pressure of

4 N m^{- 2}

. The heat released in this process is

24 J {mol}^{- 1} K^{- 1}

and is used to increase the pressure of

1

mole of

Al

. The temperature of

Al

increases by:

EASY

Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to 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?

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Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to Thermodynamics

The combination of plots which does not represent isothermal expansion of an ideal gas is

$(A)$ Question Image

$(B)$

$(C)$

$(D)$

MEDIUM

Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to 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

HARD

Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to Thermodynamics

A reversible cyclic process for an ideal gas is shown below. Here,

P, V, a n d T

are pressure, volume and temperature, respectively. The thermodynamic parameters

q, w, H a n d U

are heat, work, enthalpy and internal energy, respectively.

Question Image

The correct option(s) is (are)

MEDIUM

Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to Thermodynamics

A system consisting of 1 mol of an ideal gas undergoes a reversible process,

A \to B \to C \to A

(schematically indicated in the figure below). If the temperature at the starting point A is 300 K and the work done in the process

B \to C

is 1 L atm, the heat exchanged in the entire process in L atm is

Question Image

MEDIUM

Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to Thermodynamics

A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of

37 . 0^{\circ} C

. As it does so, it absorbs 208 J of heat. The values of q and w for the process will be
(R = 8.314 J/mol K) (ln7.5 = 2.01)

EASY

Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to 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>Chemical thermodynamics and energetics>Introduction to Thermodynamics

Which of the following is NOT an intensive property?

EASY

Chemistry>Physical Chemistry>Chemical thermodynamics and energetics>Introduction to Thermodynamics

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

q + w

ii)

q

iii)

w

iv)

H - T S

Thermodynamics is concerned with:

Important Questions on Chemical thermodynamics and energetics

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