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Author Question: How much heat energy would be needed to raise the temperature of a 15.0 g sample of iron (s = 0.448 ... (Read 113 times)

cnetterville

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Question 1

Given:                    
Cu2O(s) + O2(g) → 2CuO(s)
ΔH° = –144 kJ
Cu2O(s) → Cu(s) + CuO(s)
ΔH° = +11 kJ
Calculate the standard enthalpy of formation of CuO(s).


–166 kJ
–299 kJ
+299 kJ
+155 kJ
–155 kJ

Question 2

How much heat energy would be needed to raise the temperature of a 15.0 g sample of iron (s = 0.448 J/o C∙g) from 20.0oC to 98.0oC?

34.9 J
672 J
1.17 kJ
524 J
None of these are correct.


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Marked as best answer by cnetterville on Mar 21, 2021

krakiolit

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cnetterville

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Reply 2 on: Mar 21, 2021
YES! Correct, THANKS for helping me on my review


alvinum

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

 

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