Question 8.41

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maddybiebel
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Joined: Tue Nov 15, 2016 3:00 am

Question 8.41

Postby maddybiebel » Fri Jan 12, 2018 1:31 pm

I was wondering why the terms look different for the enthalpy of water and the enthalpy of the ice melting-- I understand that the ice goes through a phase change but I couldn't find in the textbook why both molar and specific heat were used in the solution.

Thanks

Charles Ang 1E
Posts: 50
Joined: Thu Jul 13, 2017 3:00 am

Re: Question 8.41

Postby Charles Ang 1E » Fri Jan 12, 2018 2:15 pm

The method that the solutions manual uses for phase changes uses the molar heat capacity because it is the one we use with Hfus. The specific heat is also used for the second half of the question because the information we were given is in grams, making specific heat easier to use.

Swetha Sundaram 1E
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Re: Question 8.41

Postby Swetha Sundaram 1E » Fri Jan 12, 2018 5:46 pm

The enthalpy change for the water in the ice cube will be composed of two terms: the heat to melt the ice at 0 degrees Celsius and the heat required to raise the ice form 0 degrees Celsius to the final temperature.


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