contestada

What is the change in entropy of helium gas with total mass 0.120 kg at the normal boiling point of helium when it all condenses isothermally to liquid helium? Assume that the normal boiling point of helium is 4.216 K and the heat of vaporization of helium is 2.09×10^4 J/kg .

Respuesta :

boffeemadrid

Answer:

-594.87666 J/kg

Explanation:

m = Mass of Helium = 0.12 kg

T = Temperature = 4.216 K

[tex]H_v[/tex] = Heat of vaporization = [tex]-2.09\times 10^{4}\ J/kg[/tex]

Change in entropy is given by

[tex]\Delta S=\dfrac{mH_v}{T}\\\Rightarrow \Delta S=\dfrac{0.12\times -2.09\times 10^{4}}{4.216}\\\Rightarrow \Delta S=-594.87666\ J/kg[/tex]

The change in entropy is -594.87666 J/kg

Otras preguntas