Question

Materials research is an important area of chemistry. It is responsible for the generation of new plastics, glass, solar pannels, semiconductors, road material and many others. During the process of making a new material often times determining the melting point is vitally important to understand ways to mass produce it. The process of melting a new previously unknown material was found to have a AH = 247.7 kJ/mol and a AS = 283.5/(mol*K). Above what temperature will the material melt spontaneously? give your answer in K Answer:

Answer 1

We know. $\Delta G=\Delta H-T\Delta S$

Also, a process is spontaneous when $\Delta G$ <0.

So,$\Delta G$=247700-T x 283.5.

So, for the process to be spontaneous.

247700-T x 283.5<0

T>873.721K