Homework Answers
Answer:
The enthalpy of formation of any substance is determined from its constituent atoms in there naturally existing elemental of molecular state at STP conditions. The stoichiometry here is set that gives one mole of the substance.
Based on this we have,
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19. Which of these reactions correspond to the enthalpy of formation (OHC) A C2H2(g) + H2(g)...
19. Which of these reactions correspond to the enthalpy of formation (AH;°) 3 C2H2(g)H2(g)- CH(g) H2(l)02()H20(l) Cdiam...
19. Which of these reactions correspond to the enthalpy of formation (AH;°) 3 C2H2(g)H2(g)- CH(g) H2(l)02()H20(l) Cdiamond02 (g) - CO2(g) D) A) B) C) H20 (g)H20(l) Na(s) C(g) NaCl(s) E)
Which thermochemical equation gives the value of the standard enthalpy of formation for NH4C104(s)? N(g) +...
Which thermochemical equation gives the value of the standard enthalpy of formation for NH4C104(s)? N(g) + 2 H2(g) + CI(g) + 2 O2(g) ---> NH4C104(s) N(g) + 2 H2(g) + Cl2(1) +2 O2(g) ---> NH4C104() 1/2 N2(g) + 2 H2(g) + 1/2 C12(g) + 2 O2(g) ---> NH4C104(s) N(g) + 4 H(g) + Cl(g) + 4 0(g) ---> NH4C104(8) ON(g) + 2 H2(g) + C1(g) + 2 02(9) ---> NH4C104(s) ON(g) + 2 H2(g) + C12(1) + 2 02(E) --->...
Using standard heats of formation, calculate the standard enthalpy change for the following reaction 2HBr(g) H2(g)...
Using standard heats of formation, calculate the standard enthalpy change for the following reaction 2HBr(g) H2(g) + Br2() ANSWER kJ Submit Answer Retry Entire Group 2 more group attempts remaining Given the standard enthalpy changes for the following two reactions: (1) Zn(s)+ Cl2(g) ZnCl2(s) AH° = -415.0 kJ (2) Fe(s) + Cl2(g) FeCl2(s) AH° = -341.8 kJ what is the standard enthalpy change for the reaction: (3) Zn(s) + FeCl(s) AH° ? ZnCl2(s) + Fe(s) kJ Given the standard enthalpy...
Calculate the standard enthalpy of formation of gaseous acetylene (C2H2) using the following thermochemical information: 2...
Calculate the standard enthalpy of formation of gaseous
acetylene (C2H2) using the following
thermochemical information:
2
C2H2(g) + 5 O2(g) 4 CO2(g) + 2 H2O(l)
H = -2599.3 kJ
CO2(g) C(s) + O2(g)
H = +393.5 kJ
2 H2O(l) 2 H2(g) + O2(g)
H = +571.7 kJ
H = kJ
Part A Based on the standard free energies of formation, which of the following reactions represent...
Part A Based on the standard free energies of formation, which of the following reactions represent a feasible way to synthesize the product? Drag the appropriate items to their respective bins. View Available Hint(s) Help Reset 2CO(g)+02(8)+2CO2 (g) AG=-788.0 kJ/mol N2 (g)+O2(g)-2NO (g) AG= 173.2 kJ/mol 2Na(s)+02(8) -Na, O, (s) AGi=-451.0 kJ/mol 2C(s)+ H2(g)-C2H2 (8) 209.2 kJ/mol AGi Not a feasible synthesis Feasible synthesis
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....
17. Given the flloving reactions H20 (1) H20 (g) 2 H2 (g) + 02 () 2...
17. Given the flloving reactions H20 (1) H20 (g) 2 H2 (g) + 02 () 2 H20 (g) AH 483.64 kJ AH-44.01 k the enthalpy for the decomposition of liquid water into gaseous hydrogen and oxygen 2 H20 1) 2 H2 (g) + 02(8) kJ. A)-395.62 B) -527.65 C) 439.63 D) 571.66 E) 527.65
Which of the following is NOT associated with an enthalpy change for a transformation? The formation...
Which of the following is NOT associated with an enthalpy change for a transformation? The formation of bonds or inter-particle interactions The breaking of bonds or inter-particle interactions The separation of particles during a transformation NONE of them are NOT associated (.e., they ALL ARE associated) with an enthalpy change QUESTION 2 According to the Second Law of Thermodynamics, which must increase for a reaction to be spontaneous? Gurt Syys Suniverse Sun QUESTION 3 Choose the process that has a...
Using standard heats of formation, calculate the standard enthalpy change for the following reaction. H2(g) +...
Using standard heats of formation, calculate the standard enthalpy change for the following reaction. H2(g) + Cl2(g)—>2HCI(g) ANSWER: kJ Using standard heats of formation, calculate the standard enthalpy change for the following reaction. 2H20(1)——2H2(g) + O2(g) ANSWER: kJ
21. See the figure to the right (enthalpy on y-axis) reaction progress on X-axis. Which of...
21. See the figure to the right (enthalpy on y-axis) reaction progress on X-axis. Which of the following is true? Consider the reaction: 2 H2(g) + O2(g) + 2 H20) Enthalpy 2H₂g) + 024] L2H₂O(1) Reaction Progress a. b. c. d. A = AH for bond breaking. B=AH for bond formation A = AH for bond breaking B - AH for bond formation A=AH for bond formation. B=AH for bond breaking A = AH for bond formation. B=AH for bond...
19. Which of these reactions correspond to the enthalpy of formation (AH;°) 3 C2H2(g)H2(g)- CH(g) H2(l)02()H20(l) Cdiamond02 (g) - CO2(g) D) A) B) C) H20 (g)H20(l) Na(s) C(g) NaCl(s) E)
Which thermochemical equation gives the value of the standard enthalpy of formation for NH4C104(s)? N(g) + 2 H2(g) + CI(g) + 2 O2(g) ---> NH4C104(s) N(g) + 2 H2(g) + Cl2(1) +2 O2(g) ---> NH4C104() 1/2 N2(g) + 2 H2(g) + 1/2 C12(g) + 2 O2(g) ---> NH4C104(s) N(g) + 4 H(g) + Cl(g) + 4 0(g) ---> NH4C104(8) ON(g) + 2 H2(g) + C1(g) + 2 02(9) ---> NH4C104(s) ON(g) + 2 H2(g) + C12(1) + 2 02(E) --->...
Using standard heats of formation, calculate the standard enthalpy change for the following reaction 2HBr(g) H2(g) + Br2() ANSWER kJ Submit Answer Retry Entire Group 2 more group attempts remaining Given the standard enthalpy changes for the following two reactions: (1) Zn(s)+ Cl2(g) ZnCl2(s) AH° = -415.0 kJ (2) Fe(s) + Cl2(g) FeCl2(s) AH° = -341.8 kJ what is the standard enthalpy change for the reaction: (3) Zn(s) + FeCl(s) AH° ? ZnCl2(s) + Fe(s) kJ Given the standard enthalpy...
Calculate the standard enthalpy of formation of gaseous
acetylene (C2H2) using the following
thermochemical information:
2
C2H2(g) + 5 O2(g) 4 CO2(g) + 2 H2O(l)
H = -2599.3 kJ
CO2(g) C(s) + O2(g)
H = +393.5 kJ
2 H2O(l) 2 H2(g) + O2(g)
H = +571.7 kJ
H = kJ
Part A Based on the standard free energies of formation, which of the following reactions represent a feasible way to synthesize the product? Drag the appropriate items to their respective bins. View Available Hint(s) Help Reset 2CO(g)+02(8)+2CO2 (g) AG=-788.0 kJ/mol N2 (g)+O2(g)-2NO (g) AG= 173.2 kJ/mol 2Na(s)+02(8) -Na, O, (s) AGi=-451.0 kJ/mol 2C(s)+ H2(g)-C2H2 (8) 209.2 kJ/mol AGi Not a feasible synthesis Feasible synthesis
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....
17. Given the flloving reactions H20 (1) H20 (g) 2 H2 (g) + 02 () 2 H20 (g) AH 483.64 kJ AH-44.01 k the enthalpy for the decomposition of liquid water into gaseous hydrogen and oxygen 2 H20 1) 2 H2 (g) + 02(8) kJ. A)-395.62 B) -527.65 C) 439.63 D) 571.66 E) 527.65
Which of the following is NOT associated with an enthalpy change for a transformation? The formation of bonds or inter-particle interactions The breaking of bonds or inter-particle interactions The separation of particles during a transformation NONE of them are NOT associated (.e., they ALL ARE associated) with an enthalpy change QUESTION 2 According to the Second Law of Thermodynamics, which must increase for a reaction to be spontaneous? Gurt Syys Suniverse Sun QUESTION 3 Choose the process that has a...
Using standard heats of formation, calculate the standard enthalpy change for the following reaction. H2(g) + Cl2(g)—>2HCI(g) ANSWER: kJ Using standard heats of formation, calculate the standard enthalpy change for the following reaction. 2H20(1)——2H2(g) + O2(g) ANSWER: kJ
21. See the figure to the right (enthalpy on y-axis) reaction progress on X-axis. Which of the following is true? Consider the reaction: 2 H2(g) + O2(g) + 2 H20) Enthalpy 2H₂g) + 024] L2H₂O(1) Reaction Progress a. b. c. d. A = AH for bond breaking. B=AH for bond formation A = AH for bond breaking B - AH for bond formation A=AH for bond formation. B=AH for bond breaking A = AH for bond formation. B=AH for bond...
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