Lecture


Moderators: Chem_Mod, Chem_Admin

sharonvivianv
Posts: 63
Joined: Fri Apr 06, 2018 11:05 am

Lecture

Postby sharonvivianv » Tue Jan 29, 2019 5:06 pm

Can someone summarize the explanation of the heating curve. I didn't exactly follow everything that was said.

Diviya Khullar 1G
Posts: 59
Joined: Fri Sep 28, 2018 12:19 am

Re: Lecture

Postby Diviya Khullar 1G » Tue Jan 29, 2019 10:28 pm

I believe you are asking about the heating curve for water that was presented in class. It illustrates that during a phase transition, there will be heat going into the reaction but there'll be no change in the temperature of the sample because all of that work is being used for the phase change.

marisaimbroane1J
Posts: 69
Joined: Fri Sep 28, 2018 12:23 am

Re: Lecture

Postby marisaimbroane1J » Tue Jan 29, 2019 11:06 pm

The heating curve also showed that there is much more energy required to convert water from a liquid to vapor than from a solid to liquid; this was used to explain why someone with a burn from 100 degree water vapor would have a more serious injury than someone burned with 100 degree water.

Melissa Bu 1B
Posts: 36
Joined: Fri Sep 28, 2018 12:19 am

Re: Lecture

Postby Melissa Bu 1B » Tue Jan 29, 2019 11:21 pm

Moreover, the heating curve showed that water vapor burns more than liquid water even though they are at the same temperature (100˚C, shown on Y axis), because water vapor has more heat than liquid water (shown by the fact that it is further right on the X axis, which represents heat).

Ashley Kim
Posts: 62
Joined: Fri Sep 28, 2018 12:19 am
Been upvoted: 1 time

Re: Lecture

Postby Ashley Kim » Tue Jan 29, 2019 11:52 pm

Ultimately, the heating curve for water shows how the phases (solid, liquid, gas) of water change over time as the water is consistently heated. It also relates with the enthalpy of fusion and the enthalpy of vaporization because the heat accumulates, resulting in these phase changes.

Eva Guillory 2E
Posts: 44
Joined: Fri Sep 28, 2018 12:22 am

Re: Lecture

Postby Eva Guillory 2E » Wed Jan 30, 2019 1:28 pm

Image


Return to “Concepts & Calculations Using First Law of Thermodynamics”

Who is online

Users browsing this forum: No registered users and 2 guests