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Thermodynamics - 2 Test (17-12-2016) - IIT JAM MCQ


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30 Questions MCQ Test - Thermodynamics - 2 Test (17-12-2016)

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Thermodynamics - 2 Test (17-12-2016) - Question 1

The entropy change involved in the isothermal reversible expansion of 2 moles of an ideal gas from a volume of 10 dm3 to a volume of 100 dm3 at 270C is:

Thermodynamics - 2 Test (17-12-2016) - Question 2

For the process, 1 Ar (300 K, 1 bar), → 1 Ar (200 K, 10 bar) Assuming ideal gas behaviour the change in molar entropy is:

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Thermodynamics - 2 Test (17-12-2016) - Question 3

The free energy change (ΔG) of 1 mole of an ideal gas that is compressed isothermally form 1 atm to 2 atm is:

Thermodynamics - 2 Test (17-12-2016) - Question 4

In conversion of limestone to lime

CaCO3(s) → CaO(s) + CO2(g) the values of ΔH0 and ΔS0 are +179.1 kJ mol and 160.2 JK-1 respectively at 298 K and 1 bar. Assuming that ΔH0 and ΔS0 do not change with temperature, temperature above which conversion of limestone to lime will be spontaneous is:

Thermodynamics - 2 Test (17-12-2016) - Question 5

Consider the following reactions:

The heat of formation of CO(g) is:

Thermodynamics - 2 Test (17-12-2016) - Question 6

In thermodynamic, a process is called reversible when:

Thermodynamics - 2 Test (17-12-2016) - Question 7

Which of the following equations represents a reaction that provides the enthalpy of formation of CH3Cl2:

Thermodynamics - 2 Test (17-12-2016) - Question 8

For 1 mole of a monoatomic ideal gas, the relation between pressure (P), volume (V) and average molecular kinetic energy is:

Thermodynamics - 2 Test (17-12-2016) - Question 9

If enthalpy of hydrogenation of C6H6(l) into C6H12(l) is –205 kJ and resonance energy of C6H6(l) is –152 kJ/mol then enthalpy of hydrogenation of is assume ΔHVap of C6H6(l), C6H8(l), C6H12(l) all are equal:

Thermodynamics - 2 Test (17-12-2016) - Question 10

The standard free energies of formation of H2S(g) and CdS(s) at 1000°C are –49.0 kJ/mol and –127.2 kJ/mol respectively. Use these date to predict whether H2(g) will reduce CdS(s) to metallic Cd at this temperature:

Thermodynamics - 2 Test (17-12-2016) - Question 11

if Δf H0 (C2H4) and Δf H0 (C2H6) are x1 and x2 kcal mol-1, then heat of hydrogenation of C2H4 is :

Thermodynamics - 2 Test (17-12-2016) - Question 12

A monoatomic ideal gas undergoes a process in which the ratio of p to V at any instant is constant and equal to 1. What is the molar heat capacity of the gas:

Thermodynamics - 2 Test (17-12-2016) - Question 13

The internal pressure of a Vander Wall’s gas is:

Thermodynamics - 2 Test (17-12-2016) - Question 14

During the isothermal free expansion process the entropy of the surrounding & System respectively:

Thermodynamics - 2 Test (17-12-2016) - Question 15

Consider the following data : B.E (N-H) = 393 kJ/mol and B.E (H-H) = 436 Kj/mol , The N–N bond energy in N2H4 is:

 

*Multiple options can be correct
Thermodynamics - 2 Test (17-12-2016) - Question 16

Among the following, intensive property is/are:

*Multiple options can be correct
Thermodynamics - 2 Test (17-12-2016) - Question 17

One mole of monoatomic ideal gas initially at a pressure of 2.0 bar and tamperture of 300 K is taken to a final pressure of 4.00 bar by a reversible path define by P/V = constant. Taking CV to be equal to 12.5 J mol-1K-1. The correct deduction for this process is/are:

*Multiple options can be correct
Thermodynamics - 2 Test (17-12-2016) - Question 18

Select the correct conditions indicated below the following plots:

Thermodynamics - 2 Test (17-12-2016) - Question 19

The given graph represent the variations of Z Vs P, for the real gases A, B and C identify the only incorrect statement:

 

*Multiple options can be correct
Thermodynamics - 2 Test (17-12-2016) - Question 20

One mole of an ideal gas is subjected to a step reversible process (A - B and B - C ). The kpressure at A and C is same. Mark the correct statment(s):

*Answer can only contain numeric values
Thermodynamics - 2 Test (17-12-2016) - Question 21

A sample of gas is compressed at a pressure of 0.5 atmosphere form a volume of 40 mL to 200 mL. During the process 8.0 Joules of heat flows to the surrounding. Calculate the change in internal energy of the system


*Answer can only contain numeric values
Thermodynamics - 2 Test (17-12-2016) - Question 22

Given that standard molar enthalpies of formation of NO(g) and NO2(g) are respectively 90.3 kJ/mole and 33.2 kJ/mol, the enthalpy change for the reaction,

is (in kJ)


*Answer can only contain numeric values
Thermodynamics - 2 Test (17-12-2016) - Question 23

How many grams of oxygen are contained in 10.5 L of oxygen measured over water at 250C and 740 torr? Vapor pressure of water at 250C is 24 torr.


*Answer can only contain numeric values
Thermodynamics - 2 Test (17-12-2016) - Question 24

The coefficient of cubic expansion α and the isothermal compressibility β for metallic copper at 250C have value 49.2×10-6 K-1 and 7.747×10-6 MPa-1, respectively. Density of Cu at 250C is 8.93 g cm-3. Calculate Cp–Cv per mole for Cu.


*Answer can only contain numeric values
Thermodynamics - 2 Test (17-12-2016) - Question 25

0.35 mol of an ideal monoatomic gas is expanded adiabatically from a volume of 1 dm3 at 400 K to a volume of 5 dm3 against a constant external pressure of 50.65 KPa. What is the final temperature of the gas (in K)


*Answer can only contain numeric values
Thermodynamics - 2 Test (17-12-2016) - Question 26

A 2L vessel containing 2g of H2 gas at 27°C is connected to a 2L vessel containing 176 g of CO2 gas at 27°C. Assuming ideal behaviour of H2 and CO2, the particle pressure of H2 at equilibrium is ………………….bar:


*Answer can only contain numeric values
Thermodynamics - 2 Test (17-12-2016) - Question 27

2 mole of an ideal gas expanded isothermally and reversibly form 1L to 10L at 300 K. What is the enthalpy change:


*Answer can only contain numeric values
Thermodynamics - 2 Test (17-12-2016) - Question 28

50 ml of a gas A diffuse through a membrane in the same time as for the diffusion of 40 ml of gas B under identical condition of pressure and temperature. If the molecular mass of A is 64 that of B would be:


*Answer can only contain numeric values
Thermodynamics - 2 Test (17-12-2016) - Question 29

36 ml of pure water takes 100 sec to evaporate from a vessel and heater connected to an electric source.which delivers 806 watt.the ΔHvap  of H2o is (in k j /mole)


*Answer can only contain numeric values
Thermodynamics - 2 Test (17-12-2016) - Question 30

0.5 mole each of two ideal gases A and Bare taken in a container and expanded reversibly and adiabatically, during this process temp of gaseous mixture decreased from 350 K to 250 K find ΔH (in cal/mol) for the process:(in R gas constant)


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