1
JEE Main 2022 (Online) 28th June Evening Shift
Numerical
+4
-1

For combustion of one mole of magnesium in an open container at 300 K and 1 bar pressure, $$\Delta$$CH$$\Theta$$ = $$-$$601.70 kJ mol$$-$$1, the magnitude of change in internal energy for the reaction is __________ kJ. (Nearest integer)

(Given : R = 8.3 J K$$-$$1 mol$$-$$1)

2
JEE Main 2022 (Online) 28th June Morning Shift
Numerical
+4
-1

4.0 L of an ideal gas is allowed to expand isothermally into vacuum until the total volume is 2.0 L. The amount of heat absorbed in this expansion is ____________ L atm.

3
JEE Main 2022 (Online) 27th June Evening Shift
Numerical
+4
-1

When 5 moles of He gas expand isothermally and reversibly at 300 K from 10 litre to 20 litre, the magnitude of the maximum work obtained is __________ J. [nearest integer] (Given : R = 8.3 J K$$-$$1 mol$$-$$1 and log 2 = 0.3010)

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

A fish swimming in water body when taken out from the water body is covered with a film of water of weight 36 g. When it is subjected to cooking at 100$$^\circ$$C, then the internal energy for vaporization in kJ mol$$-$$1 is ___________. [nearest integer]

[Assume steam to be an ideal gas. Given $$\Delta$$vapH$$^\Theta$$ for water at 373 K and 1 bar is 41.1 kJ mol$$-$$1 ; R = 8.31 J K$$-$$1 mol$$-$$1]