Homework Answers
ΔG = ΔH - TΔS
ΔG = (602 - T * 0.109 ) KJ / mol
@ 1000 K
ΔG = 602 - 1000*0.109 = 493 KJ / mol non spontaneous reaction so not feasible at 1000 K.
@ 6000 K
ΔG = 602 - 6000*0.109 = - 52 KJ / mol ΔG is negative so reaction is spontaneous and thus feasible at 6000 K.
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QUESTION 19 3 points S In the reaction Mg0(s) → Mg(s) + + 0.502(g) the enthalpy change AH*) is +6...
2) Write down a Born-Haber cycle for magnesium oxide (Mg0). Using the data provided below, determine...
2) Write down a Born-Haber cycle for magnesium oxide (Mg0). Using the data provided below, determine the experimental value of the lattice enthalpy Uexp. Now calculate the lattice enthalpy Ucale (unit cell of Mg0 shown below). What do these values tell you about the bonding in Mg0? AHP(Mg0)--602 k]/mol Alto (Mg) = + 148 kJ/mol AH to (02) = +249 kJ/mol bond enthalpy (02)+498 k]/mol 16, (Mg) = +738 kJ/mol IE2 (Mg) +1451 k]/mol EA (O) = +142 kJ/mol EA2(0)...
A chemist measures the enthalpy change AH during the following reaction: 2 HNO3(1) + Mg(s)—Mg(NO3),(s) +...
A chemist measures the enthalpy change AH during the following reaction: 2 HNO3(1) + Mg(s)—Mg(NO3),(s) + H2(9) AH=-443. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction ΔΗ 443 kJ x 6 Mg(NO3),(s) + H2(g) → 2HNO3(1) + Mg(s) HN05(69) + Mg(s) – į Mg(NOx),() + <H() 4Mg(NO3),(s) + 4H, (8) — 8HN0g() + 4Mg(s) [kJ OkJ
Calculate the enthalpy change for the following reactions. Balance the equation and calculate the enthalpy change:...
Calculate the enthalpy change for the following reactions. Balance the equation and calculate the enthalpy change: 9. MgO(s) + H, (g) + Mg(s) + H,O(1) Mg(s) + 12 0,) ► MgO(s) AH =-602 kJ H,(s) + 0,(9) H,00 AH = –242 kJ 602 kJ - 242 kJ = 360 kJ = AH 10. NaCl(s) + H2O → Na+ (aq) + Cl(aq) NaCl(s) → Nat(g) + CH) Nat(g) + CHg) → Na*(aq) + Cl(aq) AH =? AH = 788 kJ/mol AH...
A chemist measures the enthalpy change AH during the following reaction: 2 HNO3(1) + Mg(s) Mg(NO3),(s)...
A chemist measures the enthalpy change AH during the following reaction: 2 HNO3(1) + Mg(s) Mg(NO3),(s) + H2(9) AH=-443. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction ΔΗ 4HN03(1) + 2Mg () — 2Mg(NO3),(5) + 2H, (6) Mg(NO3), (5) + H, (8) — 24NO3 (1) + Mg () xs ? kJ 3Mg(NO3), (s) + 3H, (8) — 6HNO3(1) + 3Mg(s)
A chemist measures the enthalpy change AH during the following reaction: 2 HNO3(1) + Mg(s) Mg(NO3),(s)...
A chemist measures the enthalpy change AH during the following reaction: 2 HNO3(1) + Mg(s) Mg(NO3),(s) + H2(9) AH--443. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction W HN0,0) + Mg(6) – Mg(NO),(m) + H,@) 4Mg(NO), 6) + 4H, 6) - BHNO, () + 4Mg() Mg(NO),6) + H, (B) — 2HNO, (1) + Mg(6)
M14. For a particular reaction, the enthalpy change is AH° = +100 kJ/mol and the entropy change is AS° = + 100 J/...
M14. For a particular reaction, the enthalpy change is AH° = +100 kJ/mol and the entropy change is AS° = + 100 J/mol K. What is the equilibrium constant at 300 K?
The standard enthalpy change for the following reaction is -415 kJ at 298 K. Zn(s) + Ch(g) → ZnCl2() AH° = -415 k...
The standard enthalpy change for the following reaction is -415 kJ at 298 K. Zn(s) + Ch(g) → ZnCl2() AH° = -415 kJ What is the standard enthalpy change for the reaction at 298 K? ZnCl(s) — Zn(s) + Cl2(g) The standard enthalpy change for the following reaction is -50.6 kJ at 298 K. N2H40 - N2(g) + 2 H2(g) AH° = -50.6 kJ What is the standard enthalpy change for this reaction at 298 K? N2(g) + 2 H2(g)...
The standard enthalpy change for the following reaction is 641 kJ at 298 K. MgCl2(s) Mg(s)...
The standard enthalpy change for the following reaction is 641 kJ at 298 K. MgCl2(s) Mg(s) + Cl2(g) ΔH° = 641 kJ What is the standard enthalpy change for this reaction at 298 K? Mg(s) + Cl2(g) MgCl2(s)
19. The standard enthalpy of formation for NH (g) is -46.1 kJmolCalculate AH for the reaction...
19. The standard enthalpy of formation for NH (g) is -46.1 kJmolCalculate AH for the reaction 2NH(g)N() 3H.() B 46.1 kJ (A) -92.2 kJ Di 922 kJ (C) 46.1 k 4. Calculate the change in enthalpy (in kJ per mole of CO) for the decomposition of sodium hydrogen carbonate from AH kJmol' NaHCO,(s) Na,CO,(s) H,O() CO (g) the standard enthalpies of formation: 2 NaHCO,(s) Na CO,(s)H0(g) -947.7 -1130.9 -241.8 -393.5 CO(e) (B -818.5 C -1766.2 (D) -3661.6 A 129.2 9....
The standard enthalpy change for the following reaction is -704 kJ at 298 K. Al(s) +...
The standard enthalpy change for the following reaction is -704 kJ at 298 K. Al(s) + 3/2 Cl2(g) — AICI3(8) AH° = -704 kJ What is the standard enthalpy change for the reaction at 298 K? 2 AICI3(s) — 2 Al(s) + 3 Cl2(9) kJ The standard enthalpy change for the following reaction is 851 kJ at 298 K. 2 NaOH(s) —— 2 Na(s) + O2(g) + H2(g) AH° = 851 kJ What is the standard enthalpy change for this...
2) Write down a Born-Haber cycle for magnesium oxide (Mg0). Using the data provided below, determine the experimental value of the lattice enthalpy Uexp. Now calculate the lattice enthalpy Ucale (unit cell of Mg0 shown below). What do these values tell you about the bonding in Mg0? AHP(Mg0)--602 k]/mol Alto (Mg) = + 148 kJ/mol AH to (02) = +249 kJ/mol bond enthalpy (02)+498 k]/mol 16, (Mg) = +738 kJ/mol IE2 (Mg) +1451 k]/mol EA (O) = +142 kJ/mol EA2(0)...
A chemist measures the enthalpy change AH during the following reaction: 2 HNO3(1) + Mg(s)—Mg(NO3),(s) + H2(9) AH=-443. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction ΔΗ 443 kJ x 6 Mg(NO3),(s) + H2(g) → 2HNO3(1) + Mg(s) HN05(69) + Mg(s) – į Mg(NOx),() + <H() 4Mg(NO3),(s) + 4H, (8) — 8HN0g() + 4Mg(s) [kJ OkJ
Calculate the enthalpy change for the following reactions. Balance the equation and calculate the enthalpy change: 9. MgO(s) + H, (g) + Mg(s) + H,O(1) Mg(s) + 12 0,) ► MgO(s) AH =-602 kJ H,(s) + 0,(9) H,00 AH = –242 kJ 602 kJ - 242 kJ = 360 kJ = AH 10. NaCl(s) + H2O → Na+ (aq) + Cl(aq) NaCl(s) → Nat(g) + CH) Nat(g) + CHg) → Na*(aq) + Cl(aq) AH =? AH = 788 kJ/mol AH...
A chemist measures the enthalpy change AH during the following reaction: 2 HNO3(1) + Mg(s) Mg(NO3),(s) + H2(9) AH=-443. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction ΔΗ 4HN03(1) + 2Mg () — 2Mg(NO3),(5) + 2H, (6) Mg(NO3), (5) + H, (8) — 24NO3 (1) + Mg () xs ? kJ 3Mg(NO3), (s) + 3H, (8) — 6HNO3(1) + 3Mg(s)
A chemist measures the enthalpy change AH during the following reaction: 2 HNO3(1) + Mg(s) Mg(NO3),(s) + H2(9) AH--443. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction W HN0,0) + Mg(6) – Mg(NO),(m) + H,@) 4Mg(NO), 6) + 4H, 6) - BHNO, () + 4Mg() Mg(NO),6) + H, (B) — 2HNO, (1) + Mg(6)
M14. For a particular reaction, the enthalpy change is AH° = +100 kJ/mol and the entropy change is AS° = + 100 J/mol K. What is the equilibrium constant at 300 K?
The standard enthalpy change for the following reaction is -415 kJ at 298 K. Zn(s) + Ch(g) → ZnCl2() AH° = -415 kJ What is the standard enthalpy change for the reaction at 298 K? ZnCl(s) — Zn(s) + Cl2(g) The standard enthalpy change for the following reaction is -50.6 kJ at 298 K. N2H40 - N2(g) + 2 H2(g) AH° = -50.6 kJ What is the standard enthalpy change for this reaction at 298 K? N2(g) + 2 H2(g)...
19. The standard enthalpy of formation for NH (g) is -46.1 kJmolCalculate AH for the reaction 2NH(g)N() 3H.() B 46.1 kJ (A) -92.2 kJ Di 922 kJ (C) 46.1 k 4. Calculate the change in enthalpy (in kJ per mole of CO) for the decomposition of sodium hydrogen carbonate from AH kJmol' NaHCO,(s) Na,CO,(s) H,O() CO (g) the standard enthalpies of formation: 2 NaHCO,(s) Na CO,(s)H0(g) -947.7 -1130.9 -241.8 -393.5 CO(e) (B -818.5 C -1766.2 (D) -3661.6 A 129.2 9....
The standard enthalpy change for the following reaction is -704 kJ at 298 K. Al(s) + 3/2 Cl2(g) — AICI3(8) AH° = -704 kJ What is the standard enthalpy change for the reaction at 298 K? 2 AICI3(s) — 2 Al(s) + 3 Cl2(9) kJ The standard enthalpy change for the following reaction is 851 kJ at 298 K. 2 NaOH(s) —— 2 Na(s) + O2(g) + H2(g) AH° = 851 kJ What is the standard enthalpy change for this...
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