Question

JEE QUESTIONS
please help me​

Answer 1

$\sf{Molar \:mass \:of\: ethanol \:(C2H6O) = 46 g mol^{-1}}$

$\sf{No. \:Of\: moles= \dfrac{Mass}{Molar \:Mass}}$

$\sf{=> \dfrac{6.24 g}{46g mol^{-1}}}$

$\sf{=> 0.1357\: mol}$

$\sf{Enthalpy\: of \:Vapourisation = \dfrac{5.89kJ}{0.1357mol}}$

$\sf{=> 43.4kJ mol^{-1}}$