CHEMWORK Use the values of S° given below to calculate AS° for the following reaction: 2Na(s) + 2H20(/) → 2NaOH(aq) + H2(g) AS°(J/mol K) Na(s) 51.0 H20(1) 69.91 NaOH(aq) 49.8 H2(g) 130.6 (Enter your answer to three significant figures.) AS° rxn J/K

Consider the reaction 6CO2(g) + 6H20((1) C,H12O6 + 602(g) for which AH° = 2.801×10° kJ and AS° = -259.0 J/K at 298.15 K. (1) Calculate the entropy change of the UNIVERSE when 1.722 moles of CO2(g) react under standard conditions at 298.15 K. ASuniverse J/K (2) Is this reaction reactant or product favored under standard conditions? (3) If the reaction is product favored, is it enthalpy favored, entropy favored, or favored by both enthalpy and entropy? If the reaction is reactant favored, choose 'reactant favored'.

Question 18 of 25 > Given the reactions, X(s) + 0,(g) –→ XO(s) AH = -562.9 kJ XCO,(s) XO(s) + CO, (g) AH = +447.1 kJ what is AH for this reaction? X(S) + 글0(g) + CO,(g) XCO,(s) ΔΗ- kJ

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Given the information A+ B → 2D AH° = -682.0 kJ AS° = 296.0 J/K С — D ΔΗ. 392.0 kJ AS = -103.0 J/K calculate AG at 298 K for the reaction А +В — 2C -251.60 AG kJ Incorrect

Use the molar DHf° under the formulas to calculate DH°rxn for the equations as balanced: 1. 2B2H6(g) + 3CO2(g) --> 2B2O3(s) + 3CH4(g)  ΔH°rxn = _______ kJ        ΔH°f = +36          –394         –1274       –75 kJ/mol exo ? endo_thermic 2. 2P2O5 + 2CaC2 -->P4 + 2CaCO3 + 2CO2   ΔH°rxn = _______ kJ      ΔH°f = –1505   –59      ___   –1207     –394 kJ/mol exo ? endo_thermic 3. 2Na2CrO4(s) + 10HCl(g) --> 4NaCl(s) + 3Cl2(g) + Cr2O3(s) + 5H2O(l) ΔH°f = –1342            –92            –411         ___        –1140     –286 kJ/mol ΔH°rxn = _______ kJ        exo ? endo_thermic

"M" represents a metallic element.  "X" represents a nonmetallic element.  Calculate ΔH for the process M3X4(s) ⟶ 3M(s) + 2X2(g) from the following information: M(s) + ½X2(g) ⟶ MX(s)  ΔH°= -286.2 kJ 3MX(s) + ½X2(g) ⟶ M3X4(s)  ΔH°= -84.3 kJ

Using the values in the table below, calculate AGxn at 375 K for the reaction: 3 CO g) + 4 NH3(g) → 3 CH3OH(g) + 2 N2(g) AH°F, kJ/mol AG°, kJ/mol S°, J/mol K COg) CH3OH(g) CH3OH NH3(aq) NH3(g) N2(9) -111 -137 198 -201 -162 238 -239 -166 127 -80 -27 111 -46 -17 193 192 +55 +15 -7 +100,414 +150

Given the information AS = 302.0 J/K AS = -153.0 J/K А +В — 2D AH = 699.7 kJ С — D AH' = 398.0 kJ calculate AG at 298 K for the reaction A +B → 20 AG" = kJ

O-234 kJ 234 kJ -150. kJ -117 kJ Given: -1835kJ AH°, AHᵒf (kJ/mol) -941 -840 QUESTION 12 Use the standard reaction enthalpies given below to determine AH°rxn for the following reaction: P4(g) + 10 Cl₂(g) → 4 PC|5(s) PC15(s) → PC13(g) + Cl₂(g) P4(g) + 6 Cl₂(g) → 4 PCl3(g) rxn IF7(g) IF 5(9) 2(g) 62.42 = ? ΔΗ° rxn AH°rxn = +157 kJ = -1207 KJ QUESTION 13 Use the AH°f and AH°rxn information provided to calculate AH°f for IF: IF7(9) + 12(g) → IF5(g) + 2 IF(g) AH°rxn = -89 kJ