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26-07-2019
Physics

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At 1 atm pressure, the heat of sublimation of gallium is 277 kJ/mol and the heat of vaporization is 271 kJ/mol. To the correct number of significant figures, how much heat is required to melt 2.50 mol of gallium at 1 atm pressure?

Respuesta :

01-08-2019

Answer:15 KJ

Explanation:

We have given

at 1 atm

The heat of sublimation of Gallium =277 KJ/mol

heat of vaporization of Gallium =271 KJ/mol

[tex]\Delta H=277-271=6KJ/mol[/tex]

So heat required to melt 2.50 mol of gallium at 1 atm

Heat Required=[tex]2.5\times 6=15 KJ[/tex]

So heat required to melt 2.5 mol of gallium is 15 KJ

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