Calculate the standard heat of formation of calcium carbide (CaC2(s)) from its elements in kJ/mol using the following thermochemical equations. (hint come up with the overall equation first) Ca(s) + 2H2O(l) ⇒ Ca(OH)2(s) + H2(g) ΔH°= - 414.79 kJ 2C(s) + O2(g) ⇒ 2CO(g) ΔH°= - 221.00 kJ CaO(s) + H2O(l) ⇒ Ca(OH)2(s) ΔH°= - 65.19 kJ 2H2(g) + O2(g) ⇒ 2H2O(l) ΔH°= - 571.80 kJ CaO(s) + 3C(s) ⇒ CaC2(s) + CO(g) ΔH°= + 462.30 kJ
Calculate the standard heat of formation of calcium carbide (CaC2(s)) from its elements in kJ/mol using the following thermochemical equations. (hint come up with the overall equation first) Ca(s) + 2H2O(l) ⇒ Ca(OH)2(s) + H2(g) ΔH°= - 414.79 kJ 2C(s) + O2(g) ⇒ 2CO(g) ΔH°= - 221.00 kJ CaO(s) + H2O(l) ⇒ Ca(OH)2(s) ΔH°= - 65.19 kJ 2H2(g) + O2(g) ⇒ 2H2O(l) ΔH°= - 571.80 kJ CaO(s) + 3C(s) ⇒ CaC2(s) + CO(g) ΔH°= + 462.30 kJ
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter5: Thermochemistry
Section: Chapter Questions
Problem 5.84QE
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- Calculate the standard heat of formation of calcium carbide (CaC2(s)) from its elements in kJ/mol using the following thermochemical equations.
(hint come up with the overall equation first)
Ca(s) + 2H2O(l) ⇒ Ca(OH)2(s) + H2(g) ΔH°= - 414.79 kJ
2C(s) + O2(g) ⇒ 2CO(g) ΔH°= - 221.00 kJ
CaO(s) + H2O(l) ⇒ Ca(OH)2(s) ΔH°= - 65.19 kJ
2H2(g) + O2(g) ⇒ 2H2O(l) ΔH°= - 571.80 kJ
CaO(s) + 3C(s) ⇒ CaC2(s) + CO(g) ΔH°= + 462.30 kJ
Transcribed Image Text:4. Calculate the standard heat of formation of calcium carbide (CaC2(s)) from its elements in kJ/mol using the
following thermochemical equations.
(10 min)
(hint come up with the overall equation first)
Ca(s)
+ 2H₂O) ⇒ Ca(OH)2(s) +
2C(s) + O2(g) → 2CO(g)
CaO(s) + H₂O ⇒ Ca(OH)2(s)
2H₂(g) + O₂(g) → 2H₂O)
CaO (s) + 3C(s)
CaC2(s) + CO(g)
H₂(g)
AH° - 414.79 kJ
AH° - 221.00 kJ
AH° - 65.19 kJ
AH° - 571.80 kJ
AH° +462.30 kJ
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