1
JEE Main 2022 (Online) 25th June Morning Shift
Numerical
+4
-1
Change Language

The standard entropy change for the reaction

4Fe(s) + 3O2(g) $$\to$$ 2Fe2O3(s) is $$-$$550 J K$$-$$1 at 298 K.

[Given : The standard enthalpy change for the reaction is $$-$$165 kJ mol$$-$$1]. The temperature in K at which the reaction attains equilibrium is _____________. (Nearest Integer)

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2
JEE Main 2022 (Online) 25th June Morning Shift
Numerical
+4
-1
Change Language

The standard free energy change ($$\Delta$$G$$^\circ$$) for 50% dissociation of N2O4 into NO2 at 27$$^\circ$$C and 1 atm pressure is $$-$$ x J mol$$-$$1. The value of x is ___________. (Nearest Integer)

[Given : R = 8.31 J K$$-$$1 mol$$-$$1, log 1.33 = 0.1239 ln 10 = 2.3]

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3
JEE Main 2021 (Online) 1st September Evening Shift
Numerical
+4
-1
For the reaction, 2NO2(g) $$\rightleftharpoons$$ N2O4(g), when $$\Delta$$S = $$-$$176.0 JK$$-$$1 and $$\Delta$$H = $$-$$57.8 kJ mol$$-$$1, the magnitude of $$\Delta$$G at 298 K for the reaction is ___________ kJ mol$$-$$1. (Nearest integer)
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4
JEE Main 2021 (Online) 27th August Evening Shift
Numerical
+4
-1
Two flasks I and II shown below are connected by a valve of negligible volume.

JEE Main 2021 (Online) 27th August Evening Shift Chemistry - Thermodynamics Question 38 English
When the valve is opened, the final pressure of the system in bar is x $$\times$$ 10$$-$$2. The value of x is __________. (Integer answer)

[Assume - Ideal gas; 1 bar = 105 Pa; Molar mass of N2 = 28.0 g mol$$-$$1; R = 8.31 J mol$$-$$1 K$$-$$1]
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