jee_main_2026_22_january_morning - Thermodynamics Topics

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QUESTION #41 Adiabatic Process and Atomicity
The volume of an ideal gas increases 8 times and temperature becomes (1/4)^textth of initial temperature during a reversible change. If there is no exchange of heat in this process (Delta Q = 0) then identify the gas from the following options (Assuming the gases given in the options are ideal gases):
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QUESTION #60 Work and Internal Energy
Match the LIST-I with LIST-II
List-I (Thermodynamic Process)List-II (Magnitude in kJ)
A. Work done in reversible, isothermal expansion of 2 mol of ideal gas from 2text dm^3 to 20text dm^3 at 300 K.I. 4
B. Work done in irreversible isothermal expansion of 1 mol ideal gas from 1text m^3 to 3text m^3 at 300 K against a constant pressure of 3kPa.II. 11.5
C. Change in internal energy for adiabatic expansion of a 1 mol ideal gas with change of temperature = 320 K and overlineC_v = frac32RIII. 6
D. Change in enthalpy at constant pressure of 1 mole ideal gas with change of temperature = 337 K and overlineC_p = frac52RIV. 7
Choose the correct answer from the option given below:
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QUESTION #75 Gibbs Energy and Equilibrium Constant
Dissociation of a gas A_2 takes place according to the following chemical reactions. At equilibrium, the total pressure is 1 bar at 300K. A_2(g) rightleftharpoons 2A(g) The standard Gibbs energy of formation of the involved substances has been provided below:
SubstanceDelta G_f^circ / textkJ mol^-1
A_2-100.00
A-50.832
The degree of dissociation of A_2(g) is given by (x times 10^-2)^1/2 where x = ____. (Nearest integer). [Given: R = 8text J mol^-1textK^-1, log 2 = 0.3010, log 3 = 0.48]
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