In: Chemistry
Estimate the melting point of nickel, Ni, if its ∆fusH is 17.61 kJ/mol and its ∆fusS is 10.21 J/mol·K. (Compare this to a measured melting point of 1455◦C.)
Melting point of nickel is , T = ∆fusH / ∆fusS
Given that ∆fusH = 17.61 kJ/mol
= 17.61x103 J/mol
∆fusS = 10.21 J/mol·K
So melting point is , T = (17.61x103 J/mol) / (10.21 J/mol·K)
= 1724.7 K
= 1724.7 - 273 K
= 1451.7 oC
Therefore the theoretical metling point is 1451.7 oC
Given the measured melting point of 1455oC
So the measured melting point is higher than the actual value.