JEE Main 2020 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 2 September 2020, Shift 1, Chemistry Q46

Question 46 of 75 in this shift, Chemistry question 21 of 25.

The internal energy change (in J) when 90 g of water undergoes complete evaporation at

100^\circ

C is ______. (Given :

\Delta H_{vap}

for water at 373 K = 41 kJ/mol,

R=8.314\ \mathrm{JK^{-1}\ mol^{-1}}

)

Official answer

189000.00 to 190000.00

NTA final key (Sep 2020). Any value in the range scored.

Same idea in other shifts