2013-2-27 Projections of the p-v-T Surface p-T projection (phase diagram) p-v projection (p-v diagram) 3-15 Projections of the p-v-T Surface Projection of the p-v-T surface onto the pressure-temperature Twoduce toies plane is a phase diagram. Saturation temperature designates the temperature at which a phase change Critica takes place at a given Solid Liquid poin pressure. L Saturation pressure Vapor designates the pressure at Triple poi which a phase change takes Temperature place at a given temperature. Within two-phase regions pressure and temperature are not independent. 3-16 8 2013-2-27 8 3-15 Projections of the p-v-T Surface p-T projection (phase diagram) p-v projection (p-v diagram) Projections of the p-v-T Surface ►Projection of the p-v-T surface onto the pressure-temperature plane is a phase diagram. ►Saturation temperature designates the temperature at which a phase change takes place at a given pressure. ►Saturation pressure designates the pressure at which a phase change takes place at a given temperature. ►Within two-phase regions pressure and temperature are not independent. 3-16 Two-phase regions reduce to lines