Chemical Thermodynamics - Chemistry MCQ

A quantity of CH₄ (g) at 298K is compressed reversibly and adiabatically from 50.0 bar to 200 bar. Assuming ideal behaviour. The value of final temperature of CH₄ (g).  (Take  = 3R ) ______________ (answer should be an integer).

Hie change in entropy, when temperature is lower down to 1/8 of initial temperature at constant volume is

The change in enthalpy when 5 mole of liquid benzene transforms to the vapour state at its boiling temperature(90°C) and at 1 bar pressure is (ΔS_V = 87J K -mol) _____________________KJ. (Round off to two decimal places).

A steam engine operates between 400K and 300K under higher pressure. The minimum amount of heat that must be with drawn from the hot reservoir to obtain 1000 J of work is

N moles of a polyatomic gas (f=6) must be mixed with two moles of a monoatomic gas so that the mixture behaves as a diatomic gas. The value of N is :

The change in entropy if one mole of S0₂(g) at 300K and 1.00 bar is heated to 1000K and its pressure is decreased to 0.010 bar. The molar heat InCorrect capacity of SC₂(g) to be

The change in entropy for the following transformation is respectively (+ indicates increases. - indicates decreases and 0 indicates no change)

A gas obeys the equation P (V_m - b) = RT.  For this gas  b = 0.0391 dm³ mol^-1 .The fugacity coefficient for the gas at 1000°C and 1000 atm is

The correct relation for ΔU in van der Waal gas (in isothermal variation ) is

is exothermic by 97030 J at 298K and 1 atm measured in a bomb calorimeter. The value of ΔH is 

The ΔG_mix  when 10 moles of Ne get mixed with 20 moles of equimolar mixture of He and Ne is ____________kJ.(Round off to one decimal place)

A system filled with 0.505 mol of gas contracts reversibly from 1L to 0.10 L at constant temperature at 5°C. It simultaneously loses 1270 J of heat. The ΔU is____________J. (Round off to nearest integer))

The molar heat capacity at constant pressure of  H₂O (g) at 1.00 atm is given by
Cp =30.54 + 10.3 x 10^-3 T
The change in entropy when 2.0 mole of water at 1.00 atm. The temperature of H₂O(g) is increased from 300K to 1000K is____________J K. (Round off to two decimal places)

The molecular partition function of a system is given by  where the symbols have their usual meanings. The heat capacity at constant volume for this system is 

1 mole of N_2, 2 mole of O₂ and 1 mole of CO₂ were mixed at 300K. The entropy of mixing is

One mole of an ideal ga s C_v = 1.5 R at temperature 40 0K is com pressed from 2 atm to 3 atm by a reversible isothermal path. Subsequantly, it is expanded back to 2 atm by a reversible adiabatic path. The value of final state in litre is

Choose the correct option in the favour of exact differential