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4. Calculate the standard heat of formation of calcium carbide (CaC) from its elements in kJ/mol using the following thermochemical equations. (hint come up with the overall equation first) Ca+ 2H₂O ⇒ Ca(OH)2 + H₂ 2C+0⇒ 2CO CaO + H₂O⇒ Ca(OH)200 2H₂ + O⇒ 2H₂O CaO + 3C = CaC + CO ΔΗ°= - 414.79 kJ ΔΗ°= - 221.00 kJ ΔΗ°= - 65.19 kJ ΔΗ°= - 571.80 kJ ΔΗ°= + 462.30 kJ

4. Calculate the standard heat of formation of calcium carbide (CaC) from its elements in kJ/mol using the following thermochemical equations. (hint come up with the overall equation first) Ca+ 2H₂O ⇒ Ca(OH)2 + H₂ 2C+0⇒ 2CO CaO + H₂O⇒ Ca(OH)200 2H₂ + O⇒ 2H₂O CaO + 3C = CaC + CO ΔΗ°= - 414.79 kJ ΔΗ°= - 221.00 kJ ΔΗ°= - 65.19 kJ ΔΗ°= - 571.80 kJ ΔΗ°= + 462.30 kJ

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter6: Thermochemisty
Section: Chapter Questions
Problem 6.147QP: The head of a strike anywhere match contains tetraphosphorus trisulfide, P4S3. In an experiment, a...
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4. Calculate the standard heat of formation of calcium carbide (CaC) from its elements in kJ/mol using the following thermochemical equations. (hint come up with the overall equation first) Ca(s) + 2H₂O ⇒ Ca(OH)2(s) + H₂(g) 2C(s) + O2(g) → 2CO CaO + H₂O⇒ Ca(OH)2() 2H2(g) + O2(g) → 2H₂O) CaO) + 3C,,→ CaCs) + CO ΔΗ°= - 414.79 kJ ΔΗ°= - 221.00 kJ ΔΗ°= - 65.19 kJ ΔΗ°= - 571.80 kJ AH°= + 462.30 kJ 1
Transcribed Image Text:4. Calculate the standard heat of formation of calcium carbide (CaC) from its elements in kJ/mol using the following thermochemical equations. (hint come up with the overall equation first) Ca(s) + 2H₂O ⇒ Ca(OH)2(s) + H₂(g) 2C(s) + O2(g) → 2CO CaO + H₂O⇒ Ca(OH)2() 2H2(g) + O2(g) → 2H₂O) CaO) + 3C,,→ CaCs) + CO ΔΗ°= - 414.79 kJ ΔΗ°= - 221.00 kJ ΔΗ°= - 65.19 kJ ΔΗ°= - 571.80 kJ AH°= + 462.30 kJ 1
Selected Standard Molar Enthalpies of Formation AH₁ AH; AH₁ Substance (kJ/mol) Substance (kJ/mol) Substance (kJ/mol) Al₂O3(s) -1675.7 HBr(g) CaCO3(s) -1207,6 HCl(g) CaCl₂(s) Ca(OH)₂(s) CCL₂(E) CCL4(8) CHCI () CH₂(g) C₂H₂(g) C₂H₁(g) C₂H₂(g) CzHs(g) CH() CH₂OH(E) C₂H₂OH() CO(g) CO₂(g) COCI₂(g) +49.1 Fe₂O₂(8) -239.2 Fe,O4(s) -277.6 FeCl₂(s) CH3COOH(E) –484.3 FeCls(s) -110.5 FeS (8) CS₂(e) CS₂(g) CrCla(g) Cu(NO₂)₂ (8) -795.4 HF(g) -985.2 HCN(g). -128.2 H₂O(E) -95.7 H₂O(g) CuO(s) CuCl(s) CuCl₂(s) -134.1 H₂O₂(e) -74.6 HNO (0) +227.4 H₂PO4(s) +52.4 H₂S(g) -84.0 H₂SO4(e) -103.8 FeO(s) –36.3|NH(8) -92.3 N₂H4(e) -273.3 NH Cl(s) +135.1 NH₂NO(s) -285.8 NO(g) -393.5 PbCl₂(s) -219.1 MgCl₂(s) +89.0 MgO(s) +116.7 Mg(OH)2(s) -556.5 HgS(s) -241.8 NO₂(g) -187.8 N₂O(g) -174.1 N₂O(g) 1284.4 PH,(g) -20.6 PCl₂(g) 814.0 P,O,(s) -272.0 P4O₁0(s) -824.2 KBr(s) -1118.4 KCl(s) -341.8 KCIO,(s) -399.5 KOH(s) -178.2 AgaCO₂ (s) -359.4 AgCl(s) -641.3 AgNO,(s) -601.6 Ag S(s) -924.5 SFB(g) -58.2 SO₂(g) -302.9 NaCl(s) -411.2 SO₂(g) -157.3 NaOH(s) -425.6 SnCl₂(s) -137.2 Na₂CO3(s)-1130.7 SnCl4(e) -220.1 -45.9 +50.6 -314.4 -365.6 +91.3 +33.2 +81.6 +11.1 +5.4 -287.0 -2144.3 -2984.0 -393.8 -436.5 -397.7 -424.6 -505.8 -127.0 -124.4 -32.6 -1220.5 -296.8 -395.7 -325.1 -511.3 Note: The enthalpy of formation of an element in its standard state is defined as zero.
Transcribed Image Text:Selected Standard Molar Enthalpies of Formation AH₁ AH; AH₁ Substance (kJ/mol) Substance (kJ/mol) Substance (kJ/mol) Al₂O3(s) -1675.7 HBr(g) CaCO3(s) -1207,6 HCl(g) CaCl₂(s) Ca(OH)₂(s) CCL₂(E) CCL4(8) CHCI () CH₂(g) C₂H₂(g) C₂H₁(g) C₂H₂(g) CzHs(g) CH() CH₂OH(E) C₂H₂OH() CO(g) CO₂(g) COCI₂(g) +49.1 Fe₂O₂(8) -239.2 Fe,O4(s) -277.6 FeCl₂(s) CH3COOH(E) –484.3 FeCls(s) -110.5 FeS (8) CS₂(e) CS₂(g) CrCla(g) Cu(NO₂)₂ (8) -795.4 HF(g) -985.2 HCN(g). -128.2 H₂O(E) -95.7 H₂O(g) CuO(s) CuCl(s) CuCl₂(s) -134.1 H₂O₂(e) -74.6 HNO (0) +227.4 H₂PO4(s) +52.4 H₂S(g) -84.0 H₂SO4(e) -103.8 FeO(s) –36.3|NH(8) -92.3 N₂H4(e) -273.3 NH Cl(s) +135.1 NH₂NO(s) -285.8 NO(g) -393.5 PbCl₂(s) -219.1 MgCl₂(s) +89.0 MgO(s) +116.7 Mg(OH)2(s) -556.5 HgS(s) -241.8 NO₂(g) -187.8 N₂O(g) -174.1 N₂O(g) 1284.4 PH,(g) -20.6 PCl₂(g) 814.0 P,O,(s) -272.0 P4O₁0(s) -824.2 KBr(s) -1118.4 KCl(s) -341.8 KCIO,(s) -399.5 KOH(s) -178.2 AgaCO₂ (s) -359.4 AgCl(s) -641.3 AgNO,(s) -601.6 Ag S(s) -924.5 SFB(g) -58.2 SO₂(g) -302.9 NaCl(s) -411.2 SO₂(g) -157.3 NaOH(s) -425.6 SnCl₂(s) -137.2 Na₂CO3(s)-1130.7 SnCl4(e) -220.1 -45.9 +50.6 -314.4 -365.6 +91.3 +33.2 +81.6 +11.1 +5.4 -287.0 -2144.3 -2984.0 -393.8 -436.5 -397.7 -424.6 -505.8 -127.0 -124.4 -32.6 -1220.5 -296.8 -395.7 -325.1 -511.3 Note: The enthalpy of formation of an element in its standard state is defined as zero.
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