$1-$ II

a$)$ A block of castiron weighing. $100*kg$ emerges them the foundy at $800K$ and needs. to be cooled to $315*$ K$.$before it can be transpoited. Water at $295K$ is avallable troma civer neartey. Caloulate how.many liters: $($kg$)$ of weier's needadfor cooling the tron. II

b$)$ Calculate the entropx changes of the ifon block and the water tespectivells and also calculate the total entropx change. $1$ II

c$)$ Ifthis cooling process wes to be made in two stes where the iron $-$blockis first cooled to $450*K-$bx $xkg*$ of water at$-295-$K and then cooled to$.315*K*bx*Y*kg-$ of water at $295-K-$ please calculate X and Y$,$ also calculato the entropy changes for iron watter and overall for each$-$step. How$-$coes the total entropy change of the $2-$step coollig process compare to$-$pant $($b$)?.$Which process would you$-$prefer; a$)-$orI

b$).$ please explain$-$brisily$-$I