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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 95 times)

cnetterville

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on: Mar 21, 2021

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.
Chemistry: An Atoms First Approach ¦ Zumdahl, DeCoste ¦ 3rd Edition
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Marked as best answer by cnetterville on Mar 21, 2021

krakiolit

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Reply #1 on: Mar 21, 2021
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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cnetterville

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Reply 2 on: Mar 21, 2021
Gracias!

dawsa925

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Reply 3 on: Yesterday
Wow, this really help

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