2) Which answer choice represents the lowest whole number coefficients when the following equation is balanced? N2H4 + H202 –→N2 + H2O A) 1, 4, 2, 8 B) 1, 2, 1, 4 C) 2, 4, 2, 4 D) 2, 3, 2, 3
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- Provided the following information determine Δ?ΔHformation of C2H6(g). C(graphite) + O2(g) ⟶⟶ CO2(g) Δ?=−393.5??ΔH=−393.5kJ H2(g) + 1212O2(g) ⟶⟶ H2O(l) Δ?=−285.8??ΔH=−285.8kJ C2H6(g) + 7272O2(g) ⟶⟶ 2CO2(g) + 3H2O(l) Δ?=−1560.7??Calculate the ΔG°rxn using the following information. 2 H2S(g) + 3 O2(g) → 2 SO2(g) + 2 H2O(g) ΔG°rxn = ? ΔG°f (kJ/mol) -33.4 -300.1 -228.6 Group of answer choices +990.6 kJ -1124 kJ +562.1 kJ +72.0 kJ -990.6 kJWhat is the Ksp expression for the following reaction? Bi2S3(s) ⇄ 2 Bi3+(aq) + 3 S2−(aq) Group of answer choices Ksp = [Bi3+]2[S2−]3 Ksp = [Bi3+]2[S2−]3/[Bi2S3] Ksp = [Bi3+]3[S2−]2 Ksp = [Bi2S3]/[Bi3+][S2−] Ksp = [Bi3+][S2−] PreviousNext
- ) Calculate the ΔG°rxn using the following information. 4 HNO3(g) + 5 N2H4(l) → 7 N2(g) + 12 H2O(l) ΔG°rxn = ? ΔG°f (kJ/mol) -73.5 149.3 -237.1From the enthalpies of reaction2 C1s2 + O21g2¡ 2 CO1g2 ΔH = -221.0 kJ2 C1s2 + O21g2 + 4 H21g2¡ 2 CH3OH1g2 ΔH = -402.4 kJcalculate ΔH for the reactionCO1g2 + 2 H21g2¡CH3OH1g2According to the conventions above, what is the sign ( + or ) of the P.E. change (H) for Rxn 3?
- please solve Q12) The primary standard must satisfy one of the following criteria a) Available in pure form b) Unstable c) hygroscopic d) Has Low molecular weightWhich of the reactions have a positive ΔSrxn? Select one or more: a. 2 A(g) + 2 B(g) ⟶ 5 C(g) b. A(s) + 2 B(g) ⟶ C(g) c. 2 A(g) + 3 B(g) ⟶ 4 C(g) d. A(s) + B(g) ⟶ 2 C(g)Calculate the ΔG°rxn using the following information. 3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g) ΔG°f (kJ/mol) 51.3 −237.1 −110.9 87.6 Group of answer choices −51.0 kJ −87.6 kJ +162.5 kJ −162.5 kJ +51.0 kJ
- Calculate the ΔH°rxn for the following reaction. SiO2(s) + 4HCl(g) → SiCl4(g) + 2H2O(g) ΔH°f [SiO2(s)] = –910.9 kJ/mol; ΔH°f [SiCl4(g)] = –657.0 kJ/mol; ΔH°f [HCl(g)] = –92.3 kJ/mol; ΔH°f [H2O(g)] = –241.8 kJ/mol Group of answer choices –139.5 kJ –137.4 kJ –104.4 kJ 104.4 kJ 139.5 kJ1. Consider the following eqm: SO2(g) + NO2(g) ⇌ NO(g) + SO3(g)What effect will adding SO3 have on the rxn?What effect will removing NO2 have on the rxn? 2. Consider the following exothermic rxn at eqm: C3H8(g) + 5O2(g) ⇌ 4H2O(l) + 3CO2(g)What effect will increasing the temperature have on the rxn?What effect will increasing the pressure have on the rxn?Find the deltaH for the reaction below, given the following reactions and subsequent deltaH values: N2H4(l) + H2(g) —> 2NH3 (g) N2H4(l) + CH4O(l) —> CH2O (g) + N2(g) + 3H2(g)—— deltaH= -32.8kj N2(g)+ 3H2(g) —> 2NH3 (g)—deltaH=-57.2 kj CH4O(l) —>CH2O(g) + H2(g) —-deltaH= -65 kj SIG FIGS