Homework Answers
The Standard values of enthalpy & entropy is -
|
|
|
| CH3CH2OH (l) | -276.98 | 161.0 |
| C2H4 (g) | -52.3 | 219.5 |
| H2O (g) | -241.8 | 188.7 |
| H2 (g) | 0 | 131.0 |
| C2H6 (g) | -84.7 | 229.5 |
(f) (J/K
mol)For the First Reaction - 
(-276.98 - 52.3 - 241.8) KJ = - 87.48 kJ
For the second reaction -
(-276.98 + 0 - 84.7 - 241.8 ) kJ = + 49.5 kJ
As we can see the free energy of the reaction first reaction is negative which indicates the reaction feasibility , hence the first reaction is thermo-dynamically feasible.
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Question 2 Consider two reactions for production of ethanol: C2H4(g)H20(g) -CH3CH2OH(1) (1) C2H6(g)H20(g)CH3CH2OH (1) +H2 (g)...
5. Consider the following two reactions for the synthesis of ethanol: C2H4 (g) + H20 (8)...
5. Consider the following two reactions for the synthesis of ethanol: C2H4 (g) + H20 (8) = C3H2CH2OH (1) C2H6 (g) + H20 (g) C3H2CH2OH (1) + H2 (g) Which would be the more thermodynamically feasible at standard condition? Why?
the reactants are different some solutions do not explain this ! 5. Consider the following two reactions for the sy...
the reactants are different
some solutions do not explain this !
5. Consider the following two reactions for the synthesis of ethanol: C2H4 (g) + H20 (g) = C3H2CH2OH (1) C2H6 (g) + H20 (g) C3H2CH2OH (1) + H2 (g) Which would be the more thermodynamically feasible at standard condition? Why?
1. Calculate AH for the reaction C2H4 (8) + H2() → C2H6), from the following data....
1. Calculate AH for the reaction C2H4 (8) + H2() → C2H6), from the following data. C2H4 (g) + 3 02 (®) → 2 CO2 (s) + 2 H20 (1) C2H6 (g) + 7/2 02(g) → 2 CO2(g) + 3 H20 (1) H2 + 1/2O2() → H20 (1) AH = -1411. kJ/mole AH = -1560. kJ/mole AH = -285.8 kJ/mole 2. Calculate AH for the reaction 4 NH3(g) +502 (g) → 4 NO(g) + 6 H20 (g), from the following...
Ethanol (C2H5OH) can be prepared by many different reactions including the two shown below: (2.1) C2H4...
Ethanol (C2H5OH) can be prepared by many different reactions including the two shown below: (2.1) C2H4 (g) + H20 (g) + C2H5OH (1) (2.2) C2H6 (g) + H20 (g) → C2H5OH (1) + H2 (g) Using the thermodynamic data below, calculate the change in the Gibbs free energy (in units of kJ) for reaction 2.1 at 298.15 K. AG; (kJ/mol) Sº (J/mol.K) 0 H2 (g) H2O (g) C2H5OH (1) C2H4 (g) -228.6 -174.9 68.0 AH; (kJ/mol) 0 -241.8 -277.7 52.5...
1) C2H6 (g) -----> C2H4 (g) + H2 (g) ΔH1 = ? 2) C2H6 (g) +...
1) C2H6 (g) -----> C2H4 (g) + H2 (g) ΔH1 = ? 2) C2H6 (g) + 3.5O2 (g) -----> 2CO2 (g) + 3H2O (l) ΔH2 = -1560 kJ/mo 3) C2H4 (g) + 3O2 (g) -----> 2CO2 (g) + 2H2O (l) ΔH3 = -1411 kJ/mol 4) 2H2O (l) -----> 2H2 (g) + O2 (g) ΔH4 = 571.6 kJ/mol How much heat is transferred between the system and the surroundings when 25 grams of ethane (C2H6) decomposes to produce ethylene (C2H4) and...
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
+3 H20 (g) C2H6 (8)+5 O(g) 2 CO (g)+3 H2O (g) 2 C2H6 (g)+5 02 (g)4...
+3 H20 (g) C2H6 (8)+5 O(g) 2 CO (g)+3 H2O (g) 2 C2H6 (g)+5 02 (g)4 CO (g)+6 H20 (g) Question 11 1 pts Identify a hydrocarbon. CH3CH2OH CH3CH2CH2CH3 CH3CH2NH2 CH3COOH CH3CH2OCH2CH3 1 pts Question 12
5. Consider the following reaction: CzHs (g) → C2H4 (g) + H2 (g) AH® is +137...
5. Consider the following reaction: CzHs (g) → C2H4 (g) + H2 (g) AH® is +137 kJ/mol and AS is +120 J/K.mol. List the conditions under which this reaction is spontaneous and/or non-spontaneous. Justify your assignment (don't give exact numbers; all, high, and/or low temperature is enough)
AHºf (kJ/mol) AG°f (kJ/mol) Sº (J/mol K) 0 0 130.7 Hydrogen H2 (g) H (g) H'...
AHºf (kJ/mol) AG°f (kJ/mol) Sº (J/mol K) 0 0 130.7 Hydrogen H2 (g) H (g) H' (g) H+ (aq) 218.0 203.2 114.7 1536.2 0 -230.0 -157.0 -11.0 -285.8 -237.1 69.9 OH(aq) H20 (1) H20 (g) H2O2 (1) -241.8 -228.6 188.8 -187.8 -120.4 109.6 Iodine AH.(kJ/mol). | AGO. (k.I/mol) go (I/mol K | -53.0 -13.0 242.0 -277.7 -174.8 160.7 282.7 -235.1 -484.0 160.0 C2H40 (g, ethylene oxide) CH3CH2OH (1) CH3CH2OH (g) CH3COOH (1) C2H6 (g) C3H6 (g) CzH; (g) CH2=CHCN (1)...
Question 2 8 pts a) Calculate the AG for the formation of ethylene (C2H4) from carbon...
Question 2 8 pts a) Calculate the AG for the formation of ethylene (C2H4) from carbon and hydrogen at 25C when the partial pressures are 100 atm H2 and 0.10 atm C2H4. 2 C(s) + 2 H2(g) --> C2H4 (8) AG - 68.16) b) is the reaction spontaneous in the forward or the reverse direction? c) Is the spontaneous reaction (whether forward or reverse) more thermodynamically favorable at standard-state conditions or at the calculated conditions? a) 39.6 kJ/mole: b) reverse:c)...
5. Consider the following two reactions for the synthesis of ethanol: C2H4 (g) + H20 (8) = C3H2CH2OH (1) C2H6 (g) + H20 (g) C3H2CH2OH (1) + H2 (g) Which would be the more thermodynamically feasible at standard condition? Why?
the reactants are different
some solutions do not explain this !
5. Consider the following two reactions for the synthesis of ethanol: C2H4 (g) + H20 (g) = C3H2CH2OH (1) C2H6 (g) + H20 (g) C3H2CH2OH (1) + H2 (g) Which would be the more thermodynamically feasible at standard condition? Why?
1. Calculate AH for the reaction C2H4 (8) + H2() → C2H6), from the following data. C2H4 (g) + 3 02 (®) → 2 CO2 (s) + 2 H20 (1) C2H6 (g) + 7/2 02(g) → 2 CO2(g) + 3 H20 (1) H2 + 1/2O2() → H20 (1) AH = -1411. kJ/mole AH = -1560. kJ/mole AH = -285.8 kJ/mole 2. Calculate AH for the reaction 4 NH3(g) +502 (g) → 4 NO(g) + 6 H20 (g), from the following...
Ethanol (C2H5OH) can be prepared by many different reactions including the two shown below: (2.1) C2H4 (g) + H20 (g) + C2H5OH (1) (2.2) C2H6 (g) + H20 (g) → C2H5OH (1) + H2 (g) Using the thermodynamic data below, calculate the change in the Gibbs free energy (in units of kJ) for reaction 2.1 at 298.15 K. AG; (kJ/mol) Sº (J/mol.K) 0 H2 (g) H2O (g) C2H5OH (1) C2H4 (g) -228.6 -174.9 68.0 AH; (kJ/mol) 0 -241.8 -277.7 52.5...
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
+3 H20 (g) C2H6 (8)+5 O(g) 2 CO (g)+3 H2O (g) 2 C2H6 (g)+5 02 (g)4 CO (g)+6 H20 (g) Question 11 1 pts Identify a hydrocarbon. CH3CH2OH CH3CH2CH2CH3 CH3CH2NH2 CH3COOH CH3CH2OCH2CH3 1 pts Question 12
5. Consider the following reaction: CzHs (g) → C2H4 (g) + H2 (g) AH® is +137 kJ/mol and AS is +120 J/K.mol. List the conditions under which this reaction is spontaneous and/or non-spontaneous. Justify your assignment (don't give exact numbers; all, high, and/or low temperature is enough)
AHºf (kJ/mol) AG°f (kJ/mol) Sº (J/mol K) 0 0 130.7 Hydrogen H2 (g) H (g) H' (g) H+ (aq) 218.0 203.2 114.7 1536.2 0 -230.0 -157.0 -11.0 -285.8 -237.1 69.9 OH(aq) H20 (1) H20 (g) H2O2 (1) -241.8 -228.6 188.8 -187.8 -120.4 109.6 Iodine AH.(kJ/mol). | AGO. (k.I/mol) go (I/mol K | -53.0 -13.0 242.0 -277.7 -174.8 160.7 282.7 -235.1 -484.0 160.0 C2H40 (g, ethylene oxide) CH3CH2OH (1) CH3CH2OH (g) CH3COOH (1) C2H6 (g) C3H6 (g) CzH; (g) CH2=CHCN (1)...
Question 2 8 pts a) Calculate the AG for the formation of ethylene (C2H4) from carbon and hydrogen at 25C when the partial pressures are 100 atm H2 and 0.10 atm C2H4. 2 C(s) + 2 H2(g) --> C2H4 (8) AG - 68.16) b) is the reaction spontaneous in the forward or the reverse direction? c) Is the spontaneous reaction (whether forward or reverse) more thermodynamically favorable at standard-state conditions or at the calculated conditions? a) 39.6 kJ/mole: b) reverse:c)...
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