Homework Answers
4)
Lets number the reaction as 1, 2, 3, 4 from top to bottom
required reaction should be written in terms of other reaction
This is Hess Law
required reaction can be written as:
reaction 4 = +1 * (reaction 1) +1 * (reaction 2) -1 * (reaction 3)
So, ΔHo rxn for required reaction will be:
ΔHo rxn = +1 * ΔHo rxn(reaction 1) +1 * ΔHo rxn(reaction 2) -1 * ΔHo rxn(reaction 3)
= +1 * (-286.0) +1 * (-544.0) -1 * (-193.0)
= -637.0 KJ/mol
Answer: -637.0 KJ/mol
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Question 4 of 4 > The enthalpy changes, AH, for three reactions are given. H, ()0,()H,O)...
During an experiment, a student adds 0.339 g of calcium metal to 100.0 mL of 2.05...
During an experiment, a student adds 0.339 g of calcium metal to 100.0 mL of 2.05 M HCI. The student observes a temperature increase of 11.0 °C for the solution. Assuming the solution's final volume is 100.0 mL, the density is 1.00 g/mL, and the specific heat is 4.184 J/(g-C), calculate the heat of the reaction, A Hn Ca(s) 2H* (aq)Ca2 (aq) +H,(g) kJ/mol AH =
need help to solve it. thx! Write you answers on separate paper. Show your work for...
need help to solve it. thx!
Write you answers on separate paper. Show your work for full credit. Include the version by your name. Given the following data Ca(s)+2C(graphite) → Cac, (s) AH = -62.8 kJ Ca(s)+10,(g)>CaO(s) AH; = -634.9 kJ Cao(s)+H,0(1) + Ca(OH), (aq) AH; = -653.1 kJ C,H,(g)+{0,(8) ► 200,(g)+H,0(1) AH; =-1300.2 kJ C(graphite) +0,(g) → CO2(g) AH; = -393.5 kJ calculate AH for the reaction Cac (s)+2H,0(1) Ca(OH), (aq)+C,H,(8) Using standard enthalpies of formation along with the...
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...
Using the equations Ca (s)2 O (g) Сао (s) 2 H2 (g) Determine the enthalpy for...
Using the equations Ca (s)2 O (g) Сао (s) 2 H2 (g) Determine the enthalpy for the reaction Са (s) + 2 H0 () — Са(ОН)2 (s) + H2 (9). CaO (s) AH° = -635 kJ/mol -64 kJ/mol H2O ()Ca(OH)2 (s) AH O2 (g)2 H2O (I) AH° = -572 kJ/mol kJ/mol 1 2 3 4 6 C 5 7 8 9 +/- 0 x 100 LO 11.01 g of MgSO4 is placed into 100.0 mL of water. The water's temperature...
Part A Several reactions and their standard reaction enthalpies at 298.15 K are given here: AH...
Part A Several reactions and their standard reaction enthalpies at 298.15 K are given here: AH (kJ · mol-?) CaC2 (s) + 2H2O(1) + Ca(OH)2 (s) + C2H2 (g) –127.9 Ca(s) + O2(g) → Cao(s) CaO(s) +H2O(1) + Ca(OH)2(s) -65.2 -635.1 The standard enthalpies of combustion of graphite and C2H2(g) are –393.51 and — 1299.58 kJ · mol-? respectively. Calculate the standard enthalpy of formation of CaC2(s) at 25°C. Express your answer to one decimal place and include the appropriate...
6. Given the following thermochemical reactions 2NO N,+O 2NO+O,2NO AH=-180 kJ AH=-112 kJ Calculate the enthalpy...
6. Given the following thermochemical reactions 2NO N,+O 2NO+O,2NO AH=-180 kJ AH=-112 kJ Calculate the enthalpy change of the reaction of nitrogen with oxygen to produce nitrogen dioxide. N,+20,2NO, AH r? Lo Given the following standard enthalpy of formations: AHor [C2H$OH(I) =-277.7 kJ/mol]; AHOr [CHCO2H) =-484.5 kJ/mol]; AHr [H2O) = -285.8 kJ/mol]; AHn[O2(g) = 0 kJ/mol]. Calculate the AHn for the reaction. C,H.OH()+O,(g) ->CH,CO,H() + H2O(1)
Given the three reactions that you will measure (below) with the reaction enthalpies reported in the...
Given the three reactions that you will measure (below) with the reaction enthalpies reported in the literature, use Hess's Law to predict the enthalpy of dissolution of the target reaction. Explain how you will manipulate the equations and report your final value. 1: Ca(NO3)2* 4H2O(5) → Ca2+ (aq) +2 NO3- (aq) + 4H2O(1) Arxn = 30.3 mol 2: Na2CO3(s) +2 Na + (aq) + CO32-(aq) AHrxn=-26.7 mol AH rxn = 16.7 3: Ca(NO3)2 + 4H2O(5) + Na2CO3(5) → CaCO3(s) +...
Consider these reactions, where M represents a generic metal. 1. AH = -741.0 kJ AH =...
Consider these reactions, where M represents a generic metal. 1. AH = -741.0 kJ AH = -74.8 kJ 2 M(s) + 6 HCl(aq) 2 MCI, (aq) + 3 H, (g) HCI(g) — HCl(aq) H2(g) +CI,() — 2 HCI(8) MCI,(s) – MCI, (aq) 3. AH = -1845.0 kJ 4. AHA = -256.0 kJ Use the given information to determine the enthalpy of the reaction 2 M(s) + 3 C1, (g) — 2 MCI, () AH =
Given the standard enthalpy changes for the following two reactions: (1) 2Pb(s) - 02(0) 2PbO() AH°...
Given the standard enthalpy changes for the following two reactions: (1) 2Pb(s) - 02(0) 2PbO() AH° = -434.6 kJ (2) Pb(s) + C12(8)—„PbCl2(5) AH' =-359.4 kJ what is the standard enthalpy change for the reaction: (3) 2PbCl2(s) + O2(9)—>2PbO(s) +2012(9) AH° = ?
Consider these reactions, where M represents a generic metal. 1. AH, = -570.0 kJ 2. AH...
Consider these reactions, where M represents a generic metal. 1. AH, = -570.0 kJ 2. AH = -74.8 kJ 2 M(s) + 6 HCl(aq) + 2 MC1, (aq) + 3 H,() HCI(g) — HCl(aq) H_(8) + Cl2(g) + 2HCI(8) MCI,(s) -MCI, (aq) 3. AH = - 1845.0 kJ AHA = -365.0 kJ 4. Use the given information to determine the enthalpy of the reaction 2 M(s) + 3 CI,(g) — 2 MCI,(s) AH-
During an experiment, a student adds 0.339 g of calcium metal to 100.0 mL of 2.05 M HCI. The student observes a temperature increase of 11.0 °C for the solution. Assuming the solution's final volume is 100.0 mL, the density is 1.00 g/mL, and the specific heat is 4.184 J/(g-C), calculate the heat of the reaction, A Hn Ca(s) 2H* (aq)Ca2 (aq) +H,(g) kJ/mol AH =
need help to solve it. thx!
Write you answers on separate paper. Show your work for full credit. Include the version by your name. Given the following data Ca(s)+2C(graphite) → Cac, (s) AH = -62.8 kJ Ca(s)+10,(g)>CaO(s) AH; = -634.9 kJ Cao(s)+H,0(1) + Ca(OH), (aq) AH; = -653.1 kJ C,H,(g)+{0,(8) ► 200,(g)+H,0(1) AH; =-1300.2 kJ C(graphite) +0,(g) → CO2(g) AH; = -393.5 kJ calculate AH for the reaction Cac (s)+2H,0(1) Ca(OH), (aq)+C,H,(8) Using standard enthalpies of formation along with the...
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...
Using the equations Ca (s)2 O (g) Сао (s) 2 H2 (g) Determine the enthalpy for the reaction Са (s) + 2 H0 () — Са(ОН)2 (s) + H2 (9). CaO (s) AH° = -635 kJ/mol -64 kJ/mol H2O ()Ca(OH)2 (s) AH O2 (g)2 H2O (I) AH° = -572 kJ/mol kJ/mol 1 2 3 4 6 C 5 7 8 9 +/- 0 x 100 LO 11.01 g of MgSO4 is placed into 100.0 mL of water. The water's temperature...
Part A Several reactions and their standard reaction enthalpies at 298.15 K are given here: AH (kJ · mol-?) CaC2 (s) + 2H2O(1) + Ca(OH)2 (s) + C2H2 (g) –127.9 Ca(s) + O2(g) → Cao(s) CaO(s) +H2O(1) + Ca(OH)2(s) -65.2 -635.1 The standard enthalpies of combustion of graphite and C2H2(g) are –393.51 and — 1299.58 kJ · mol-? respectively. Calculate the standard enthalpy of formation of CaC2(s) at 25°C. Express your answer to one decimal place and include the appropriate...
6. Given the following thermochemical reactions 2NO N,+O 2NO+O,2NO AH=-180 kJ AH=-112 kJ Calculate the enthalpy change of the reaction of nitrogen with oxygen to produce nitrogen dioxide. N,+20,2NO, AH r? Lo Given the following standard enthalpy of formations: AHor [C2H$OH(I) =-277.7 kJ/mol]; AHOr [CHCO2H) =-484.5 kJ/mol]; AHr [H2O) = -285.8 kJ/mol]; AHn[O2(g) = 0 kJ/mol]. Calculate the AHn for the reaction. C,H.OH()+O,(g) ->CH,CO,H() + H2O(1)
Given the three reactions that you will measure (below) with the reaction enthalpies reported in the literature, use Hess's Law to predict the enthalpy of dissolution of the target reaction. Explain how you will manipulate the equations and report your final value. 1: Ca(NO3)2* 4H2O(5) → Ca2+ (aq) +2 NO3- (aq) + 4H2O(1) Arxn = 30.3 mol 2: Na2CO3(s) +2 Na + (aq) + CO32-(aq) AHrxn=-26.7 mol AH rxn = 16.7 3: Ca(NO3)2 + 4H2O(5) + Na2CO3(5) → CaCO3(s) +...
Consider these reactions, where M represents a generic metal. 1. AH = -741.0 kJ AH = -74.8 kJ 2 M(s) + 6 HCl(aq) 2 MCI, (aq) + 3 H, (g) HCI(g) — HCl(aq) H2(g) +CI,() — 2 HCI(8) MCI,(s) – MCI, (aq) 3. AH = -1845.0 kJ 4. AHA = -256.0 kJ Use the given information to determine the enthalpy of the reaction 2 M(s) + 3 C1, (g) — 2 MCI, () AH =
Given the standard enthalpy changes for the following two reactions: (1) 2Pb(s) - 02(0) 2PbO() AH° = -434.6 kJ (2) Pb(s) + C12(8)—„PbCl2(5) AH' =-359.4 kJ what is the standard enthalpy change for the reaction: (3) 2PbCl2(s) + O2(9)—>2PbO(s) +2012(9) AH° = ?
Consider these reactions, where M represents a generic metal. 1. AH, = -570.0 kJ 2. AH = -74.8 kJ 2 M(s) + 6 HCl(aq) + 2 MC1, (aq) + 3 H,() HCI(g) — HCl(aq) H_(8) + Cl2(g) + 2HCI(8) MCI,(s) -MCI, (aq) 3. AH = - 1845.0 kJ AHA = -365.0 kJ 4. Use the given information to determine the enthalpy of the reaction 2 M(s) + 3 CI,(g) — 2 MCI,(s) AH-
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