The hydrogen-oxygen fuel cell is described in the text. For the questions below, assume the following:...
The hydrogen-oxygen fuel cell is described in the text. For the questions below, assume the following: Assume that the air is 20 % O2 by volume and that all the O2 is consumed in the cell. The other components of air do not affect the fuel-cell reactions. Assume ideal gas behavior.
(a) What volume of H2(g), stored at 25.0°C at a pressure of 141 atm, would be needed to run an electric motor drawing a current of 8.50 A for 3.00 hr ?
b) What volume (in liters) of air at 25.0°C and 1.08 atm will have to pass into the cell per minute to run the motor ?
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The hydrogen-oxygen fuel cell is described in the text. For the
questions below, assume the following:...
that is all the information i was given Be sure to answer all parts. The hydrogen-oxygen...
that is all the information i was given
Be sure to answer all parts. The hydrogen-oxygen fuel cell is described in the text. For the questions below, assume the following: Assume that the air is 20 % 0, by volume and that all the 02 is consumed in the cell. The other components of air do not affect the fuel-cell reactions. Assume ideal gas behavior. (a) What volume of H2(g), stored at 25.0°C at a pressure of 169 atm, would...
5 – If a hydrogen fuel cell runs an electric motor drawing a current of 8.5 A for 3.0 h, what volume of H2(g) is needed...
5 – If a hydrogen fuel cell runs an electric motor drawing a current of 8.5 A for 3.0 h, what volume of H2(g) is needed if the fuel is stored at 155 atm and 25 °C? (Ideal gas law required. Assume H2 behaves as an ideal gas under these conditions.) 6 – Chromium plating can be applied by electrolysis to objects according to the following unbalanced half-reaction: Cr2O72- + e- + H+ → Cr(s) + H2O
Hydrogen and oxygen gases are utilized as reactants for fuel cells. Hydrogen gas is oxid side to ...
Hydrogen and oxygen gases are utilized as reactants for fuel cells. Hydrogen gas is oxid side to generate protons and electrons which move to the cathode side to react with oxygen to produce electricity and water as byproduct. Molecular weight: M(H2) -2 g/mol, M(O)-32 g/mol, M(H-0) - 18 g/mol. Detailed reactions in each side are described below: ized in the anode (-) side: | (+) side: Cell: H2 → 2H+ + 2e- E" 0.00V 202 + 2H+ + 2e-→ H2O...
Fuel cells can be powered by the reaction between formic acid and oxygen as following As...
Fuel cells can be powered by the reaction between formic acid and oxygen as following As formic acid and oxygen react together inside the fuel cell, it produced both electrical power and heat. While there is no shaft work produced by the fuel cells, this electrical power produced by the fuel cells can be considered as the shaft work term when you perform the energy balance. A fuel cell is being supplied with 100. liters per minute of pure formic...
19. At atmospheric pressure, a sample of oxygen gas has a volume of 1.5 liters at...
19. At atmospheric pressure, a sample of oxygen gas has a volume of 1.5 liters at 20°C. What volume, in liters will this gas occupy if the temperature is raised to 80 C? Assume ideal gas behavior a. 1.8 t b. 2.7L c. 3.9 L d. 6.0L e. 9.0L 20. How many grams of hydrogen, H2, are present in a 10.0 L gas cylinder at 25 C when the H2 pressure is 4.0 atm? Assume ideal gas behavior. a. 1.7...
In a hydrogen fuel cell, oxygen and hydrogen are combincd to produce water and a small potential differ- ence. The steps of the chemical reaction are: at-electrode: at + electrode: H2 + 20H-→ 2H2O +...
In a hydrogen fuel cell, oxygen and hydrogen are combincd to produce water and a small potential differ- ence. The steps of the chemical reaction are: at-electrode: at + electrode: H2 + 20H-→ 2H2O + 2e-; O2 + H2O + 2e-→ 2OH-, Use the table of chemical values to calculate a) the work that can be produced from this fuel cell, b) the 'waste' heat produced during standard operation, c) the voltage of the cell, and d) the minimum voltage...
1 – Balance the following Bi(OH)3 + SnO22- → SnO32- + Bi
1 – Balance the following Bi(OH)3 + SnO22- → SnO32- + Bi in basic solution Mn2+ + BiO3- → Bi3+ + MnO4- in acidic solution 2 – Describe the basic features of a galvanic cell and explain why the two components are separated from each other. 3 – Calculate the standard potential of a cell that uses a Mg/Mg2+ half-cell and a Cu/Cu2+ half-cell. Identify the oxidizing agent. 4 – What is the equilibrium constant for the cell referenced...
please do all. thanks. 1. a. A weather balloon is filled to the volume of 105...
please do all. thanks. 1. a. A weather balloon is filled to the volume of 105 L on a day when the temperature is 25°C. If no gases escaped, what would be the volume of the weather balloon after it rises to an altitude where the temperature is -9°C? Volume = L? b A 203-mL sample of a gas exerts a pressure of 2.55 atm at 19.5°C. What volume would it occupy at 1.85 atm and 190.°C? Volume = ?mL...
need help with questions EXPERIMENT 9: ELECTROLYSIS AND AVOGADRO'S NUMBER QUESTIONS 1. What solution is used...
need help with questions
EXPERIMENT 9: ELECTROLYSIS AND AVOGADRO'S NUMBER QUESTIONS 1. What solution is used in the apparatus for this experiment? a. Would anything else work? b. If so, what are some examples? 2. What gas forms at the cathode in this experiment? 3. What gas forms at the anode in this experiment? 4. How is the temperature of each of the gases determined? EXPERIMENT ELECTROLYSIS & AVOGADRO'S NUMBER UUUUUUUUUUU INTRODUCTION Electrolysis is the process of causing a chemical...
A chemistry teacher needs to make 2.30 L of a potassium chloride solution for an experimen...
A chemistry teacher needs to make 2.30 L of a potassium chloride solution for an experimen The concentration of the required solution is 3.10 M. How many grams of KCI will she need to use? 0 7.13 g KCI 0 231 g KCI O 532 g KCI 0.0956 g KCI What is the equation for the ion product constant of water at 25 °C? Kw [H,0+][OH-] [H,O] = 1.00 x 10-14 Kw [H,0+1 [OH-] = 1.00 x 10-14 Kw =...
that is all the information i was given
Be sure to answer all parts. The hydrogen-oxygen fuel cell is described in the text. For the questions below, assume the following: Assume that the air is 20 % 0, by volume and that all the 02 is consumed in the cell. The other components of air do not affect the fuel-cell reactions. Assume ideal gas behavior. (a) What volume of H2(g), stored at 25.0°C at a pressure of 169 atm, would...
Hydrogen and oxygen gases are utilized as reactants for fuel cells. Hydrogen gas is oxid side to generate protons and electrons which move to the cathode side to react with oxygen to produce electricity and water as byproduct. Molecular weight: M(H2) -2 g/mol, M(O)-32 g/mol, M(H-0) - 18 g/mol. Detailed reactions in each side are described below: ized in the anode (-) side: | (+) side: Cell: H2 → 2H+ + 2e- E" 0.00V 202 + 2H+ + 2e-→ H2O...
19. At atmospheric pressure, a sample of oxygen gas has a volume of 1.5 liters at 20°C. What volume, in liters will this gas occupy if the temperature is raised to 80 C? Assume ideal gas behavior a. 1.8 t b. 2.7L c. 3.9 L d. 6.0L e. 9.0L 20. How many grams of hydrogen, H2, are present in a 10.0 L gas cylinder at 25 C when the H2 pressure is 4.0 atm? Assume ideal gas behavior. a. 1.7...
In a hydrogen fuel cell, oxygen and hydrogen are combincd to produce water and a small potential differ- ence. The steps of the chemical reaction are: at-electrode: at + electrode: H2 + 20H-→ 2H2O + 2e-; O2 + H2O + 2e-→ 2OH-, Use the table of chemical values to calculate a) the work that can be produced from this fuel cell, b) the 'waste' heat produced during standard operation, c) the voltage of the cell, and d) the minimum voltage...
need help with questions
EXPERIMENT 9: ELECTROLYSIS AND AVOGADRO'S NUMBER QUESTIONS 1. What solution is used in the apparatus for this experiment? a. Would anything else work? b. If so, what are some examples? 2. What gas forms at the cathode in this experiment? 3. What gas forms at the anode in this experiment? 4. How is the temperature of each of the gases determined? EXPERIMENT ELECTROLYSIS & AVOGADRO'S NUMBER UUUUUUUUUUU INTRODUCTION Electrolysis is the process of causing a chemical...
A chemistry teacher needs to make 2.30 L of a potassium chloride solution for an experimen The concentration of the required solution is 3.10 M. How many grams of KCI will she need to use? 0 7.13 g KCI 0 231 g KCI O 532 g KCI 0.0956 g KCI What is the equation for the ion product constant of water at 25 °C? Kw [H,0+][OH-] [H,O] = 1.00 x 10-14 Kw [H,0+1 [OH-] = 1.00 x 10-14 Kw =...
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