HW #41

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Michelle Steinberg2J
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Joined: Fri Sep 29, 2017 7:04 am

HW #41

Postby Michelle Steinberg2J » Tue Jan 23, 2018 2:06 pm

Why do we use the specific heat capacity for water in the liquid state (4.18) to find the heat for the ice cube and the water?

Jessica Lutz 2E
Posts: 56
Joined: Fri Sep 29, 2017 7:04 am

Re: HW #41

Postby Jessica Lutz 2E » Tue Jan 23, 2018 2:15 pm

We use the specific heat capacity of water in its liquid state because, before the water changes temperature, it goes through a phase change from ice to liquid water. That is why there are two parts to the side of the equation dealing with the enthalpy as a result of the ice cube. The first part is the enthalpy because of the phase change from ice to liquid water and the second part is the enthalpy of the as of result of the liquid water (which used to be the ice cube) heating up to the final temperature.


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