Given the heating curve below where substance X starts as a solid below its melt

Question

Given the heating curve below where substance X starts as a solid below its melting point and is heating uniformly at a constant rate: a. Identify the process that takes place during line segment DE of the heating curve. b. Identify a line segment in which the average kinetic energy is increasing. c. Describe, in terms of particle behavior or energy, what is happening to substance X during line segment BC. d. What is happening to the average kinetic energy of the particles during segment BC e. How does this heating curve illustrate that the heat of vaporization is greater heat of fusion?

Explanation / Answer

a). in DE evaporation of the substance will take place.

b). in EF average kinetic energy will increase as in this stage substance will be in gasseous phase and its temprature will increase.

c). during BC the substance is melting.

d). the average kinetic energy will not change during BC as there is only hase change not temprature change.

e). because length of DE is larger than BC.

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