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 .

30.4 KJ is required to melt one mole of sodium chloride . The entropy

1.	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 .
Answer» Solution :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