Referring to the heating/cooling curve of a pure substance. Identify the line segment on the following diagram where the specific heat of the liquid is used to calculate energy flow. Identify the points on the diagram where the removal of heat will cause some of the sample to condense The phase diagram for substance A has a solid liquid curve (fusion curve) with a negative slope. Which of the following is true? A) solid A has a higher density than liquid A B) solid A has the same density of liquid A C) the phase diagram cannot be used to predict which phase of A is denser D)Freezing A is endothermic process E) none of these statements is true