Phase Change - Heating and Cooling Curve

Match the following phase chages Melting the change from solid to liquid Freezing the change from liquid to solid Boiling the change from liquid to gas Condensation the change from gas to liquid Sublimation the change from solid to gas Deposition the change from gas to solid melting freezing boiling or evaporation or vaporization condensation sublimation deposition The graph was drawn from data collected as a substance was heated at a constant rate. Use the graph to answer the following questions. At point A, the beginning of observations, the substance exists in a solid state. Material in this phase has definite volume and definite shape. With each passing minute energy is added to the substance. This causes the molecules of the substance to vibrate more rapidly which we detect by a steady rise in temperature of the substance. At point B, the temperature of the substance is 70 C. The solid begins to melt. At point C, the substance is completely melted or in a liquid state. Material in this state has definite volume but indefinite shape. The energy put to the substance between minutes 5 and 9 was used to convert the substance from a solid to a liquid. Between 9 and 13 minutes, the added energy increases the temperature of the substance. During the points D to E, the liquid is boiling. By point E, the substance is completely a gas or vapor. Material in this phase has indefinite volume and indefinite shape. Beyond point E, the substance is still in the gas phase but the molecules are moving rapidly as indicated by the rise in temperature.