Homework Help is Here – Start Your Trial Now!
Engineering
Chemical Engineering
Follow the instruction in Station 2 to calculate the freezing point of the unknown substance used in the example cooling curve show in figure 3 on the experiment file. Report both the time and temperature of the melting point.

Follow the instruction in Station 2 to calculate the freezing point of the unknown substance used in the example cooling curve show in figure 3 on the experiment file. Report both the time and temperature of the melting point.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
See similar textbooks
icon
Related questions
Question
Follow the instruction in Station 2 to calculate the freezing point of the unknown substance used in the example cooling curve show in figure 3 on the experiment file. Report both the time and temperature of the melting point.
● To determine the freezing point: o Plot the cooling curve in Excel (temperature on the y-axis vs. time on the x-axis) as shown in the example in figure 3. Plot the data as two series, one where the temperature is changing by more than 0.5 °C per 30 second reading and a second where the temperature is changing by less than 0.5 °C per 30 second reading. Fit each series to a best fit line and display the equations on the chart. Temperature ('C) 85 83 81 79 77 73 71 69 67 65 0 y=-0.0765x + 80.704 100 C103- Introduction to Principles of Chemistry 200 y = -0.0046x + 68.837 +++ 300 3-5 400 Time (s) Figure 3: Example of a cooling curve with two separate data series and two trendlines. 500 States of Matter- Soltds Liquids, and Gases 4
Transcribed Image Text:● To determine the freezing point: o Plot the cooling curve in Excel (temperature on the y-axis vs. time on the x-axis) as shown in the example in figure 3. Plot the data as two series, one where the temperature is changing by more than 0.5 °C per 30 second reading and a second where the temperature is changing by less than 0.5 °C per 30 second reading. Fit each series to a best fit line and display the equations on the chart. Temperature ('C) 85 83 81 79 77 73 71 69 67 65 0 y=-0.0765x + 80.704 100 C103- Introduction to Principles of Chemistry 200 y = -0.0046x + 68.837 +++ 300 3-5 400 Time (s) Figure 3: Example of a cooling curve with two separate data series and two trendlines. 500 States of Matter- Soltds Liquids, and Gases 4
Temp 71 69 67 65 0 100 C103- Introduction to Principles of Chemistry 200 y=-0.0046x + 68.837 3-5 300 400 Time (s) Figure 3: Example of a cooling curve with two separate data series and two trendlines. 500 Station 3: Evaporation. a phase transition from liquid to gas Page < States of Matter-Solids, Liquids, and Gases O Determine the melting point. Tm. for the pure stearic acid sample using the two trendline equations. Find the point where the two lines intersect by setting the two equations equal to one another and solving for "x". Take that "x" and use either equation to determine the temperature at which the equations are equal. The temperature at the intersection of the two lines is the freezing point. Compare your calculated freezing point to the actual melting point by determining the percent error. This unit will use the concepts of Mass and Volume from Week 1.
Transcribed Image Text:Temp 71 69 67 65 0 100 C103- Introduction to Principles of Chemistry 200 y=-0.0046x + 68.837 3-5 300 400 Time (s) Figure 3: Example of a cooling curve with two separate data series and two trendlines. 500 Station 3: Evaporation. a phase transition from liquid to gas Page < States of Matter-Solids, Liquids, and Gases O Determine the melting point. Tm. for the pure stearic acid sample using the two trendline equations. Find the point where the two lines intersect by setting the two equations equal to one another and solving for "x". Take that "x" and use either equation to determine the temperature at which the equations are equal. The temperature at the intersection of the two lines is the freezing point. Compare your calculated freezing point to the actual melting point by determining the percent error. This unit will use the concepts of Mass and Volume from Week 1.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Similar questions
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Process Dynamics and Control, 4e
Process Dynamics and Control, 4e
Chemical Engineering
ISBN:
9781119285915
Author:
Seborg
Publisher:
WILEY
Industrial Plastics: Theory and Applications
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The
SEE MORE TEXTBOOKS