$(40)1kg$ solid $Al$ is put in the furnace directly at $750C.$ The melting takes place as shown below.

Solid $Al($superheated solid$)$ at $750C=>Al($liquid$).$ Calculate:

a$)$ The enthalpy of melting at $750C.$

b$)$ The entropy of meiting at $750C.$

c$)$ The entropy of surroundings. Assume surroundings behave reversibly. Surrounding $($furnace$)$ temperature is $750C.$

d$)$ Entropy produced.

e$)$ Is this melting process spontaneous? Prove!