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Of the following, AHfº is not zero for A) F2 (s) B) O2 (g) C) Cl2...
For which of the following is ΔHo f not zero? ( ) O2(g) ( ) C (graphite) ( ) N2(g) ( ) F2(s) ( ) Cl2(g)
B) 1/2 N2(g) + 2H2(g) + 1/2 Cl2(g) → NH4Cl(s) C) N2(g) + H2(g) + Cl2(g) → 2 NH4Cl(s) D) N2(g) + Cl2(g) + 4 H2(g) → 2 NH4Cl(s) E) 1/2 N2(g) + 1/2 Cl2(g) + 1/2 H2(g) → NH4Cl(s) 12) Which molecule contains the most polar bonds? A) NBr3 B) CH4 C) CF4 D) CO2 The spheres below represent atoms of Li, Be, B, and F (not nece
Question 3 1 pts Given the bond dissociation energies (in kJ/mol) for the following diatomic molecules Cl2 (243), F2 (158), H2 (436), O2 (498), N2 (945) choose the one(s) that could be broken by using blue light (=465 nm). F2 and Cl2 o F2 F2, C12, H2, O2 and N2 F2, Cl2 and H2 F2, Cl2, H2 and 02
given the following reaction caco3(s)--->cao(s) + co2(g) delta h = 178.1kj C(s,graphite) + O2(g) ---> CO2(g) deltaH=-393.5kj the enthalpy of the reaction CaCO3(s)--->CaO(s) + C(s,graphite) + O2(g) is ________kj.
For the combustion reaction of methane, AHºf is zero for CH4 (g) + O2 (g) → 2H2O(g) + CO2 (g) A) 02 (g) B) CH4 (g) CO2 (g) D) H20 (g) E) Both O2 (g) and CH4 (g) 8 Given the following reactions N2 (g) + 202 (g) - 2NO2 (g) AH = 66.4 kJ 2NO (g) + O2 (g) → 2NO2 (g) AH = -114.2 kJ the enthalpy of the reaction of the nitrogen to produce nitric oxide N2...
All the following are oxidation–reduction reactions except: a.) H2(g) + F2(g) → 2HF(g). b.) Ca(s) + H2(g) → CaH2(s). c.) 2K(s) + 2H2O(l) → 2KOH(aq) + H2(g). d.) 6Li(s) + N2(g) → 2Li3N(s). e.) Mg3N2(s) + 6H2O(l) → 3Mg(OH)2(s) + 2NH3(g).
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
At 25°C, the following heats of reaction are known: 2CIF(g) + O2(g) → Cl20(g) + F2。dH'm = 167.4 kJ/mol 2ClF3(g) + 202(g) → Cl20(g) + 3F20(g) ΔH'm-34 1.4 kJ/mol 2F2(g) + O2(g) → 2F20(g) ΔHoxn--43.4 kJ/mol At the same temperature, use Hess's law to calculate ΔHorn for the reaction: CIF(g) + F2(g) → ClF3(g) 0 a-21 7.5 kJ/mol O b 465.4 kJ/mol O c. -108.7 kJ/mol d 217.5 kJ/mol O e-130.2 kJ/mol
3) Answer all parts of the following question. a. The reaction: Al(s) + Fe2O3(s) → Fe(s) + Al2O3(s) has ΔH = -847.6 kJ and ΔS = -41.3 J/K at 25°C. Calculate ΔG and determine if it is spontaneous. b. Above what temperature does the following reaction become nonspontaneous? FeO(s) + CO(g) → CO2(g) + Fe(s) ΔH = -11.0 kJ; ΔS = -17.4 J/K c. Find ΔSsurr and predict whether or not this reaction will be spontaneous at 398 K. NH3(g)...
Identify which of the following equations are balanced. 2KMnO4(s)→K2MnO4(s)+MnO2(s)+O2(g) C(s)+O2(g)→CO(g) 6Li(s)+N2(g)→2Li3N(s) SF4(g)+2F2(g)→SF6(g) Part B Calculate the final pressure, in atmospheres, for each of the following, if volume and amount of gas do not change. a)A gas with an initial pressure of 1.22 atm at 67 ∘C is cooled to − 31 ∘C. b)A sample of N2 with an initial pressure of 810. mmHg at − 75 ∘C is heated to 31 ∘C.