If hydrogen were used as a fuel, it could be burned according to the following reaction:...
If hydrogen were used as a fuel, it could be burned according to
the following reaction:
H2(g)+1/2O2(g)→H2O(g)
Use average bond energies to calculate ΔHrxn for this reaction.
Homework Answers
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If hydrogen were used as a fuel, it could be burned according to
the following reaction:...
Hydrogen, a potential future fuel, can be produced from carbon (from coal) and steam by the...
Hydrogen, a potential future fuel, can be produced from carbon (from coal) and steam by the following reaction: C(s,graphite)+2H2O(g)→2H2(g)+CO2(g) Note that the average bond energy for the breaking of a bond in CO2 is 799 kJ/mol. Use average bond energies to calculate ΔHrxn for this reaction.
Use average bond energies to calculate ΔHrxn for the following hydrogenation reaction: H2C=CH2(g)+H2(g)→H3C−CH3(g)
Use average bond energies to calculate ΔHrxn for the following hydrogenation reaction: H2C=CH2(g)+H2(g)→H3C−CH3(g)
Hydrogen is burned according to the following chemical reaction: 2H2(g) + O2(g) → 2H2O(l) ∆Hrxn =...
Hydrogen is burned according to the following chemical reaction: 2H2(g) + O2(g) → 2H2O(l) ∆Hrxn = -286 kJ Given 100 g of H2 and excess O2, how much heat is released?
Enthalpy and Bond Strength
Enthalpy and Bond Strength The table below lists the average bond energies that you would need to determine reaction enthalpies. Use bond energies to calculate ΔHrxn for the following reaction: 2 NO (g) + 5 H2 (g) → 2 NH3 (g) + 2 H2O (g) Enter your answer numerically, in terms of kJ and to three significant figures.
12 e used to add hydrogen across dou 81. Hydrogenation reactions are used to add hydrogen...
12 e used to add hydrogen across dou 81. Hydrogenation reactions are used to add hydrogen ble bonds in hydrocarbons and other organic compounds 11 average bond energies to calculate AHrxn for the hydrogenation reaction. H2C=CH2(g) + H2(g) → H3C-CH3(g)
9. Bond Energy. Hydrogen gas can hydrogen gas can be made by the reaction of methane...
9. Bond Energy. Hydrogen gas can hydrogen gas can be made by the reaction of methane gas and steam. CH4(8) + 2 H2O(g) → 4 H2(g) + CO2(g) Use the bond energies (Table 9.3 and Table 9.4) to gies (Table 9.3 and Table 9.4) to calculate AHan for the above reaction. (note: you need to write the Lewis structure to show how the atoms are bonded and is structure to show how the atoms are bonded and the types of...
2. Hydrogen combines with oxygen in fuel cells according to the thermochemical equation 2 H2(g) +...
2. Hydrogen combines with oxygen in fuel cells according to the thermochemical equation 2 H2(g) + O2(g) + 2 H2O(g) AH° = -571.7 kJ Suppose that you are working with a firm that is using hydrogen fuel cells to power satellites. The satellite requires 4.0 x 100 kJ of energy during its useful lifetime to stabilize its orbit. Describe how you would determine the mass of hydrogen you would need in your fuel cells for this particular satellite.
Hydrogen peroxide can be prepared in several ways. One method is the reaction between hydrogen and...
Hydrogen peroxide can be prepared in several ways. One method is
the reaction between hydrogen and oxygen, another method is the
reaction between water and oxygen. Calculate the ?G°rxn of each
reaction below using values from this table.
(1) H2(g) + O2(g)
H2O2(l)
G =
(2) H2O(l) + 1/2O2(g)
H2O2(l) G
=
Which method requires less energy under standard conditions?
Calculate the heat of reaction at constant pressure for the reaction of carbon with hydrogen gas...
Calculate the heat of reaction at constant pressure for the reaction of carbon with hydrogen gas and oxygen gas that produces acetic acid, CH3COOH. The following values may prove helpful: CH3COOH(l) + 2O2 (g) → 2CO2 (g) + 2H2O(l) ∆H = -871kJ C(graphite) + O2 (g) → CO2 (g) ∆H = -394kJ H2 (g) + 1/2 O2 (g) → H2O (l) ∆H = -286kJ
Which of the following statements is false concerning the reaction of hydrogen gas and oxygen gas given below? H2(g)+1...
Which of the following statements is false concerning the reaction
of hydrogen gas and oxygen gas given below?
H2(g)+1/2O2(g)>H2O
Which of the following statements is false concerning the reaction of hydrogen gas and oxygen gas given below? H2(g) +029) - H20(1; AH = -285.8 kJ Select one: a. For the reaction H2(g) + O2(g) - H2O(g), AH is not equal to -285 b. If the equation is reversed, AH becomes +285.8 kJ. If the equation is multiplied by 2, AH...
12 e used to add hydrogen across dou 81. Hydrogenation reactions are used to add hydrogen ble bonds in hydrocarbons and other organic compounds 11 average bond energies to calculate AHrxn for the hydrogenation reaction. H2C=CH2(g) + H2(g) → H3C-CH3(g)
9. Bond Energy. Hydrogen gas can hydrogen gas can be made by the reaction of methane gas and steam. CH4(8) + 2 H2O(g) → 4 H2(g) + CO2(g) Use the bond energies (Table 9.3 and Table 9.4) to gies (Table 9.3 and Table 9.4) to calculate AHan for the above reaction. (note: you need to write the Lewis structure to show how the atoms are bonded and is structure to show how the atoms are bonded and the types of...
2. Hydrogen combines with oxygen in fuel cells according to the thermochemical equation 2 H2(g) + O2(g) + 2 H2O(g) AH° = -571.7 kJ Suppose that you are working with a firm that is using hydrogen fuel cells to power satellites. The satellite requires 4.0 x 100 kJ of energy during its useful lifetime to stabilize its orbit. Describe how you would determine the mass of hydrogen you would need in your fuel cells for this particular satellite.
Hydrogen peroxide can be prepared in several ways. One method is
the reaction between hydrogen and oxygen, another method is the
reaction between water and oxygen. Calculate the ?G°rxn of each
reaction below using values from this table.
(1) H2(g) + O2(g)
H2O2(l)
G =
(2) H2O(l) + 1/2O2(g)
H2O2(l) G
=
Which method requires less energy under standard conditions?
Which of the following statements is false concerning the reaction
of hydrogen gas and oxygen gas given below?
H2(g)+1/2O2(g)>H2O
Which of the following statements is false concerning the reaction of hydrogen gas and oxygen gas given below? H2(g) +029) - H20(1; AH = -285.8 kJ Select one: a. For the reaction H2(g) + O2(g) - H2O(g), AH is not equal to -285 b. If the equation is reversed, AH becomes +285.8 kJ. If the equation is multiplied by 2, AH...
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