The standard enthalpy of formation ( ΔHfo ) is defined as the change in enthalpy when one mole of a substance is formed from its pure elements under STP. If all elements at both sides are in standard state then ΔHfo = ΔHorxn
Strike out Cl2(l), 2 mol product 2LiCl, decomposition of BaCO3 (its not formation reaction), CO(g) is not elemental state.
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For which of the following reactions is AHequal to AH of the product(s)?You do not need...
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Part A For which of the following reactions is A Han equal to AH of the product(s)?You do not need to look up any values to answer this question. Check all that apply. View Available Hint(s) CO(g) + O2(g) + CO2(g) C(s, graphite) + O2(8+CO(E) 0 CaCO3(g) +CaO + CO (8) Na(s) + F2(g)--NaF(s) Na(s) + F2 (1) NaF(s) 2Na(s)+F2(6)+2NaF (8) Submit Formation Reactions Part A The standard heat of formation, AH, is defined as...
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Calculate AHan for the following reaction: BaO(s) + CO2(g) → BaCO3(s) Use the following reactions and the given values of AH for them: Ba(s) + CO2(g) + O2(g) → BaCO3(8), AH = -826.5 kJ 2Ba(s) + O2(g) + 2BaO(s), AH = -1184.0 kJ Express your answer to four significant figures in kilojoules. ► View Available Hint(s) IO AD * * O2 ? AH.= 269.0
answers to 5 and 6
D Question 5 2 pts Given the following reactions: 2S (s)+3 02 (3)- 2 SO3 (3) AH 790kJ s(s) +02 (g)-502 (g) ΔΗΡ-297 kJ What is the enthalpy value (in kJ) of the reaction in which sulfur dioxide is oxidized to sulfur trioxide? 2502 (g) + O2 (g) 2503 (g) ΔΗΡ ? D Question 6 2 pts Given the following reactions: CaCO3 (s) CaO (s) + CO2 (g) HP-178.1 kJ C (s, graphite) + O2...
Question 14 Which of the reactions is/are redox
reactions
Question 14 1 pts Which of the reactions is/are redox reactions? 2Li(s) + Cl2(e) - 2LiCl(s) HCl(aq) + LiOH(aq) -> H2O(1) + LiCl(aq) KCIO3(s) →KCIO(s) + O2(g) Ca(NO3)2(aq) + Na2CO3(aq) - 2NaNO3(aq) +CaCO3(s) Ca(NO3)2(s) → 2NO3- (aq) + Ca2+(aq)
e. -1135 Given the following reactions: CaCO3 (s)-> Cao (s) + CO2 (g) C (s, graphite) + O2 (g)-> Co2 (g) AH-393.5 kJ the enthalpy of the reaction CaCO3 (s) -> CaO (s) + C (s, graphite) + O2 (g) ΔH = 178.1 kJ is kJ Select one: 4 a. 7.01 x 10 b. 571.6 ) c. 215.4 d. -215.4 ie. -571.6 Check Given the data in the table below, AH for the reaction
For which of the following reactions is ?H?rxn equal to ?H?f of the product(s)? You do not need to look up any values to answer this question. Check all that apply. H2O2(g)?12O2(g)+H2O(g) Na(s)+12F2(l)?NaF(s) 2H2(g)+O2(g)?2H2O(g) 2Na(s)+F2(g)?2NaF(s) H2(g)+12O2(g)?H2O(g) Na(s)+12F2(g)?NaF(s)
10 General, Organic, & Biological Chemistry; Fall Part A Identify which of the following equations are balanced. Check all that apply. 6Li(s) + N2(g) →2Li;N(s) SF2(g) +2F2 (g) SF6 (8) PC13 (1) + Cl2(g) →PC15(s) C(s) + O2(g) →CO(g) Submit Previous Answers Request Answer Part A Identify which of the following equations are balanced. Check all that apply. Li(s) + N2(g)—2Li; N(s) SF_(g) + 2F2(g) +SF6(g) PC13 (1) + Cl2(g) →PC15 (s) C(s) + O2(g)--CO(g) Submit Previous Answers Request Answer
4. For which of the following reactions is AH° of the reaction equal to AH, of the product? (a) CO (9) + 0.5 O2 (g) (b) Al(s) + 3 CI (g)- (c) Ni (s) + O2 (g) (d) 12 (g) + 3 F2 (g) CO2 (9) AICI: (s) NiO2 (s) 2 IF3 (9)
Given the reactions, X(s) + 10,() — XO() AH = -642.1 kJ XCO,(s) — XO(s) + CO.() AH = +195.1 kJ what is AH for this reaction? X(s) + O2(g) + CO2(g) XCO,(s) Ah =
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In the chemistry lab, one often has to work with very reactive metals such as sodium and lithium. Unfortunately, these same metals can react vigorously with water or oxygen and cause fires. Given the following information: AH (kJ/mol) Li20(s) -597.9 Na20(s) -416 K20(s) -361 CO(9) -110.5 H20(1) -286 CCl4(1) -135 LICI(S) -409 KCI(S) -436 AH (kJ/mol) Li+ (aq) -278.5 Na+ (aq) -240 K+ (aq) -251 CO2(9) -393.5 OH(aq) -230 SiO2(s) -911 NaCl(s) -411 ci(aq)...