Drawing a heat curve of ice melting

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SUMMARY

The discussion focuses on drawing a heat curve for the melting of ice, specifically addressing the x-axis values for time during the phase changes. The user correctly identifies the starting point at 225 seconds at 0°C and maintains a flat line until approximately 1403 seconds. The conversation clarifies that after the ice melts, it transitions to liquid water, then boils, and finally turns to gas. The user successfully completes the graph after receiving guidance on the necessary time values for each phase change.

PREREQUISITES
  • Understanding of phase changes in matter (solid to liquid to gas)
  • Knowledge of heat transfer and energy input (e.g., 70 W heater)
  • Familiarity with graphing techniques for temperature versus time
  • Basic principles of thermodynamics related to heat curves
NEXT STEPS
  • Research the specific time durations for phase changes of water (melting and boiling points)
  • Learn how to calculate heat energy required for phase changes using the formula Q = mL
  • Explore the concept of latent heat and its role in phase transitions
  • Study graphical representation techniques for thermodynamic processes
USEFUL FOR

Students studying thermodynamics, educators teaching heat transfer concepts, and anyone interested in understanding phase changes of water and their graphical representations.

Evangeline101
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Homework Statement


upload_2016-5-26_18-56-45.png


Homework Equations


equation with each part.

The Attempt at a Solution


I did part a) b) and c) on my own:
upload_2016-5-26_18-59-15.png


upload_2016-5-26_18-59-39.png


Part d:
I am having trouble at this part. I understand how to draw the heat curve but I am confused on what numbers I should use for the x-axis of the graph. I know that I have to start off with 225 s at 0°C, and then keep the line flat until about 1403 s, but I don't know what numbers to use from there...

any help would be appreciated :)
Thanks.
 

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Evangeline101 said:

Homework Statement


View attachment 101286

Homework Equations


equation with each part.

The Attempt at a Solution


I did part a) b) and c) on my own:
View attachment 101288

View attachment 101289

Part d:
I am having trouble at this part. I understand how to draw the heat curve but I am confused on what numbers I should use for the x-axis of the graph. I know that I have to start off with 225 s at 0°C, and then keep the line flat until about 1403 s, but I don't know what numbers to use from there...
After the ice has all melted, what does it become? If you keep adding heat to the melted ice, can't you continue to draw a curve of temperature versus time?
 
SteamKing said:
After the ice has all melted, what does it become? If you keep adding heat to the melted ice, can't you continue to draw a curve of temperature versus time?

It becomes, liquid (water), then boils, then turns to gas. I understand this part but what I don't get is what values of time should I put on the x-axis, like how long does it take for each phase to change. ex. from a water to boiling...
 
Evangeline101 said:
It becomes, liquid (water), then boils, then turns to gas. I understand this part but what I don't get is what values of time should I put on the x-axis, like how long does it take for each phase to change. ex. from a water to boiling...
Well, what information do you need to complete the curve? Assume the heater is still putting out 70 W.
 
I finally figured it out! :biggrin:
Here is my graph:

upload_2016-5-27_20-33-47.png


Thanks so much for the help! :smile:
 

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