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

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:

Consider the following reactions:

The heat of formation of CO(g) is:

In thermodynamic, a process is called reversible when:

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

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

If enthalpy of hydrogenation of C₆H_6(l) into C₆H_12(l) is –205 kJ and resonance energy of C₆H_6(l) is –152 kJ/mol then enthalpy of hydrogenation of is assume ΔH_Vap of C₆H_6(l), C₆H_8(l), C₆H_12(l) all are equal:

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 H_2(g) will reduce CdS_(s) to metallic Cd at this temperature:

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

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:

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

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

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:

Among the following, intensive property is/are:

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 C_V to be equal to 12.5 J mol^-1K^-1. The correct deduction for this process is/are:

Select the correct conditions indicated below the following plots:

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

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):

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

Given that standard molar enthalpies of formation of NO_(g) and NO_2(g) are respectively 90.3 kJ/mole and 33.2 kJ/mol, the enthalpy change for the reaction,

is (in kJ)

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.

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 C_p–C_v per mole for Cu.

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)

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:

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

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:

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 ΔH_vap  of H₂o is (in k j /mole)

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)