Psalm H.

asked • 10/26/16

PLEASE HELP ASAP WITH THIS PHASE CHANGE CALORIMETRY QUESTION!!! (CHEMISTRY)

I was wondering if you could help me come up with a proper answer for this question. I took a test and have no idea what I did wrong and the teacher will not help. I redid the problem and do not know if the answer is correct.

The question is What is the temperature change of a 2.83 kg tub of water when 500.g of Ice (starting at -12.0 degrees Celsius) is added to it?

So I got the answer 8.7 degrees Celsius and that doesn't feel correct to me.
 
Things I know
2830grams of tub water
4.184 J/g Degrees Celsius is the speccific heat of water
I don't know what Delta T is
 
Mass of the ice was 500 grams
Specific heat of ice is 2.05 J/g Degree Celsius
I do not know the delta T but I know that the temp starts at -12.0 degrees celsius
Then I need to add (The heat of fusion (334 J/g) times the mass of the ice (500g))

1 Expert Answer

By:

Ismael A. answered • 10/26/16

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Psalm H.

Thank you very much! I understand it much better now! Just to clarify however... I got the answer 15.16799 which would round to 15? Does that seem correct?
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10/26/16

Psalm H.

Wait, the 15 would be negative right?
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10/26/16

Ismael A.

Yes. It is negative.
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10/26/16

Psalm H.

So I was correct? It would be negative 15?
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10/26/16

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