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In thermodynamics, a process is called reversible when

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Important Questions on Chemical Thermodynamics

EASY

Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

Define:
Reversible process

EASY

Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

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

MEDIUM

Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

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

)

HARD

Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

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>Chemical Thermodynamics>Thermodynamic Processes

Identify the correct set of intensive properties from the following

EASY

Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

Write features of reversible process.

EASY

Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

Which of the following is not an intensive property?

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Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

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

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Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

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>Thermodynamic Processes

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

HARD

Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

An ideal gas undergoes a reversible isothermal expansion from state

I

to state

II

followed by a reversible adiabatic expansion from state

II

to state

III .

The correct plot

(s)

representing the changes from state

I

to state

III

is(are)

( $p$ : pressure, $V$ : volume, $T$ : temperature, $H$ : enthalpy, $S$ : entropy)

EASY

Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

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?

HARD

Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

One mole of an ideal monoatomic gas undergoes two reversible processes $(A \to B$ and $B \to C)$ as shown in the given figure:

Question Image

$A \to B$ is an adiabatic process. If the total heat absorbed in the entire process $(A \to B$ and $B \to C)$ is ${RT}_{2} \ln 10$ , the value of $2 {logV}_{3}$ is
[Use molar heat capacity of the gas at constant pressure, $C_{p, m} = \frac{5}{2} R$ ]

MEDIUM

Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

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>Chemical Thermodynamics>Thermodynamic Processes

Among the following the number of state variable is

Internal energy $(U)$

Volume $(V)$

Heat $(q)$

Enthalpy $(H)$

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Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

Calculate the work done during combustion of

0 .138 kg

of ethanol,

(C_{2} H_{5} OH (l))

at at

300 K.

Given:

R = 8 .314 {Jk}^{- 1} {mol}^{- 1}

and molar mass of ethanol

= 46 g {mol}^{- 1}

MEDIUM

Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

Given, van der Waal's constant for

{NH}_{3}, H_{2}, O_{2}

and

{CO}_{2}

are respectively

4.17, 0.244, 1.36 and 3.59

. Which one of the following gases is most easily liquefied?

EASY

Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

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>Thermodynamic Processes

Which of the following is NOT an intensive property?

EASY

Chemistry>Physical Chemistry>Chemical Thermodynamics>Thermodynamic Processes

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

q + w

ii)

q

iii)

w

iv)

H - T S

In thermodynamics, a process is called reversible when

Important Questions on Chemical Thermodynamics

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