30.4 KJ is required to melt one mole of sodium chloride . The entropy change during melting is `28.4JK^(-1) mol^(-1)` .Calculate the melting point of sodium chloride .

Explanation

Heat required for 1 mole of NaCl for melting (q) =30.4 K J
=30.4 x 1000 J
`DeltaS` - entropy change =`28.4 J K^(-1) "mol"^(-1)`
Melting point =`T_m`=?
`DeltaS=q/T_m " " therefore T_m =q/(DeltaS)`
`therefore T_m =(30.4xx1000)/28.4`=1070.4 K
Melting point of NaCl =1070.4 K