Basic thermodynamic in chemistry, temperature of melting ice

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Discussion Overview

The discussion revolves around basic thermodynamic concepts in chemistry, specifically focusing on the heating curve of water (H2O) and the processes of melting ice and vaporizing water. Participants explore the relationship between heat addition and temperature changes, the energy required for phase changes, and the nature of the fusion process.

Discussion Character

  • Homework-related, Conceptual clarification

Main Points Raised

  • One participant states that the temperature does not rise when heat is added to melt ice, questioning what happens to the added heat.
  • Another participant suggests that the heat is used to provide enough energy to change the solid ice into liquid water.
  • It is proposed that more heat is required to vaporize water than to melt ice, with the reasoning that vaporization involves breaking hydrogen bonds, which requires more energy compared to merely loosening bonds during melting.
  • A participant concludes that the fusion of ice is endothermic, as it requires heat to melt the ice.
  • There is some confusion regarding the validation of the answers provided, with participants seeking clarification on whether the responses are correct.

Areas of Agreement / Disagreement

Participants express uncertainty about the correctness of the answers given, indicating that there is no clear consensus on the validation of the responses.

Contextual Notes

Some assumptions about the heating curve and phase changes may not be fully articulated, and there is a lack of detailed explanation regarding the energy dynamics involved in melting and vaporization.

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Homework Statement


370979df-0d7f-417e-bd97-9ee36b8e6953.jpe

Consider the heating curve for H2O.
a. As heat is added to melt ice, does the the temperature change? Explain what happens to the heat that is added.
b. For the same amount of H2O, does it take more to melt ice or vaporize water? Explain why.
c. Is the fusion of ice endothermic or exothermic ?

Homework Equations





The Attempt at a Solution


a. Obviously the temperature doesn't rise.but what is happening to the heat that is added?
are they adding up to have enough energy to change the solid into liquid?

b.From the graph, it seem like it take more heat to vaporize the water, is it because the process requires the separation of Hydrogen bonds, which take a lot of energy in comparison to just melt the ice, where the bonds are just being loosen up?

c. It take heat to melt the ice, so it is endorthermic.

thanks for your time.
 
Physics news on Phys.org
Not at all, thank you.
 
chemisttree said:
Not at all, thank you.

I don't get your reply. Are the answers alright or not at all?
=O
 
You're all right. We just didn't understood what your problem was?

He replied to your last line "Thanks for your time".
 
my problem was i didn't know if my answers were right or not =)
 

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