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Two gases are in contact with each other so heat can flow between them. Assume no heat loss to surrounding. One gas is hot and the other gas is cold initially. Identify what happened to gases after the equilibrium condition?

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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

)

EASY

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

Calculate the work done during compression of

2

mol of an ideal gas from a volume of

1 m^{3}

10

{dm}^{3}

300 K

against a pressure of

100 kPa

EASY

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

Identify the correct set of intensive properties from the following

EASY

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

Among the following, the extensive variables are

EASY

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

Which of the following is not an intensive property?

MEDIUM

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

For the isothermal reversible expansion of an ideal gas

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

MEDIUM

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

A gas is allowed to expand in a well-insulated container against a constant external pressure of

2.5 atm

from an initial volume of

2.50 L

to a final volume of

4.50 L .

The change in internal energy

ΔU

of the gas in joules will be

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?

EASY

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

An ideal gas is allowed to expand from

1 L

10 L

against a constant external pressure of

1

bar. The work done in

k J

is:

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 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

MEDIUM

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

5

moles of an ideal gas at

100 K

are allowed to undergo reversible compression till its temperature becomes

200 K .

C_{V} = 28 J K^{- 1},

calculate

∆ U

and

∆ p V

for the process.

(R = 8.0 J K^{- 1} m o l^{- 1})

MEDIUM

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

An ideal gas in a thermally insulated vessel at internal pressure =

P_{1}

, volume =

V_{1}

and absolute temperature =

T_{1}

expands irreversibly against zero external pressure, as shown in the diagram. The final internal pressure, volume and absolute temperature of the gas are

P_{2}

V_{2}

and

T_{2}

, respectively. For this expansion,

Question Image

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

Two gases are in contact with each other so heat can flow between them. Assume no heat loss to surrounding. One gas is hot and the other gas is cold initially. Identify what happened to gases after the equilibrium condition?

Important Questions on Chemical thermodynamics and energetics

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