nati, buyintforce? (aml % HW3c Graphs That Cannot Be Un nses/last?dep 17819210 A

Question

nati, buyintforce? (aml % HW3c Graphs That Cannot Be Un nses/last?dep 17819210 An object is hested for 200 minutes. During that ti me iRt goes from solid to liquld. Use the graph below to answer the following questions. Temperature vs Time 500 480 460 440 420 400 50 200 100 Time (min) 150 a.) What is the name of the phase change that occured? b.) At what temperature did the phase change occur? C.) How long did the phase change occur? d.) During the phase change is heat leaving the object, entering the object, or neither? e.) How long was the object completoly liquid? Search the web and Windows

Explanation / Answer

a) The name of the phase change from solid to liquid is

MELTING

b)

The phase change occurs at constant temperature that is

420

c)

The phase change occurs from 80 min to 175 min so the time taken is

t = 175 - 80 min

t = 95 min

d)

During phase change the heat is enetring the object

e)

The object was completely in liquid from 175 min to 200 min that is for

25 min

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