Pada diagram PVT, juga terdapat garis triple. Garis triple adalah garis yangmenunjukkan kesetimbangan tiga fasa, yaitu fasa padat, fasa cair, dan fasa gas. Tidak adaperbedaan antara ketiga fasa tersebut dalam keadaan ini. Gibbs phase rule dirumuskan sebagai = + 2 1dimana F adalah diploma of freedom, C adalah jumlah komponen, dan P adalah jumlah fasa. Degree of freedom adalah jumlah sifat intensif. Untuk titik triple dengan zat murni, Cberjumlah 1, P berjumlah 3, sehingga F adalah 0. Although Genghis Khan died in 1227, his sons and grandsons persisted his combating tradition. They managed to take over areas of China and India that were able to face up to, or keep out, matlab Mongols. Before his dying, Genghis Khan divided his Mongol Empire into four separate elements for four of his sons: Russia and eastern Europe, matlab Middle East, critical Asia, and east Asia. When matlab Mongols tried to beat all of Europe, they stopped in Austria because their next leader, Ogedei Khan, died. Instead, matlab Mongols concentrated on retaining their hold on matlab Middle East highly effective: they conquered Baghdad in modern day Iraq, which was one engineering matlab biggest towns in matlab global at matlab time. While matlab Mongol Empire stretched throughout all of Asia, matlab had weaknesses that kept matlab from sticking round.