A fish swimming in water body when taken out from the water body is...

$A$ fish swimming in water body when taken out from the water body is covered with a film of water of weight $36g$ . When it is subjected to cooking at $100 ° C$ , then the internal energy for vaporization in ${kJmol}^{- 1}$ is integer]

[Assume steam to be an ideal gas. Given ${\Delta}_{vap}{H}^{⊖}$ for water at $373K$ and $1$ bar is $41 . 1kJ{mol}^{- 1}: R = 8 . 31J{K}^{- 1}{mol}^{- 1}$ ]

Correct answer

Step-by-step solution

Weight of water on fish $= 36$ gram

${H}_{2}O\left(l\right)\mathop{\to}_{P = 1bar}^{T = 100 ° C}{H}_{2}O\left(g\right); {\Delta H}_{vap} = 41 . 1kJ{mole}^{- 1}$

$\Delta H = \Delta U = {\Delta n}_{g}RT$

\left(41 . 1\right) \times 2 = \Delta U + \left(\dfrac{2 \times 8 . 314}{1000}\right)373 $</p><p>$ \Delta U = 82 . 2 - 6 . 2 = 76kJ $</p><p>so change in internal energy \left(inkJ / mol\right) = \dfrac{76}{2} = 38kJ / mole$

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