1
JEE Main 2022 (Online) 26th June Morning Shift
Numerical
+4
-1

For complete combustion of methanol

CH3OH(I) + $${3 \over 2}$$O2(g) $$\to$$ CO2(g) + 2H2O(I)

the amount of heat produced as measured by bomb calorimeter is 726 kJ mol$$-$$1 at 27$$^\circ$$C. The enthalpy of combustion for the reaction is $$-$$x kJ mol$$-$$1, where x is ___________. (Nearest integer)

(Given : R = 8.3 JK$$-$$1 mol$$-$$1)

2
JEE Main 2022 (Online) 26th June Morning Shift
Numerical
+4
-1

2.0 g of H2 gas is adsorbed on 2.5 g of platinum powder at 300 K and 1 bar pressure. The volume of the gas adsorbed per gram of the adsorbent is __________ mL.

(Given : R = 0.083 L bar K$$-$$1 mol$$-$$1)

3
JEE Main 2022 (Online) 25th June Morning Shift
Numerical
+4
-1

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)

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

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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