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In a hydrogen oxygen fuel cell combu...

In a hydrogen oxygen fuel cell combustion of hydrogen occurs to

A

generate heat

B

create potential difference between the two electodes

C

produce high purity water

D

remove adsorb oxygen from electrodes

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The correct Answer is:
C
An cell like fuel cell works whne potential difference is developed
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In a hydrogen oxygen uel cell, combustion of hydrogen occurs to

Fuel cells : Fuel cells are galvanic cells in which the chemical energy of fuel cell is directly converted into electrical energy. A type of fuel cell is a hydrogen - oxygen fuel cell. It consists of two electrodes made up of two porous graphite impregnated with a catalyst ( platinum, silver, or metal oxide ). The electrodes are placed in aqueous solution of NaOH . Oxygen and hydrogen are continuously fed into the cell. Hydrogen gets oxidized to H^(o+) which is neutralized by overset(c-)(O)H, i.e., anodic reaction. At cathode, O_(2) gets reduced to overset(c-)(O)H Hence, the net reaction is The overall reaction has DeltaH=-285.6 kJ mol^(-1) and DeltaG=-237.4 kJ mol^(-1) at 25^(@)C If the cell voltage is 1.23V for the H_(2)-O_(2) fuel cell and for the half cell :

Fuel cells : Fuel cells are galvanic cells in which the chemical energy of fuel cell is directly converted into electrical energy. A type of fuel cell is a hydrogen - oxygen fuel cell. It consists of two electrodes made up of two porous graphite impregnated with a catalyst ( platinum, silver, or metal oxide ). The electrodes are placed in aqueous solution of NaOH . Oxygen and hydrogen are continuously fed into the cell. Hydrogen gets oxidized to H^(o+) which is neutralized by overset(c-)(O)H, i.e., anodic reaction. At cathode, O_(2) gets reduced to overset(c-)(O)H Hence, the net reaction is The overall reaction has DeltaH=-285.6 kJ mol^(-1) and DeltaG=-237.4 kJ mol^(-1) at 25^(@)C What is the value of DeltaS^(c-) for the fuel cell at 25^(@)C ?

Fuel cells : Fuel cells are galvanic cells in which the chemical energy of fuel cell is directly converted into electrical energy. A type of fuel cell is a hydrogen - oxygen fuel cell. It consists of two electrodes made up of two porous graphite impregnated with a catalyst ( platinum, silver, or metal oxide ). The electrodes are placed in aqueous solution of NaOH . Oxygen and hydrogen are continuously fed into the cell. Hydrogen gets oxidized to H^(o+) which is neutralized by overset(c-)(O)H, i.e., anodic reaction. At cathode, O_(2) gets reduced to overset(c-)(O)H Hence, the net reaction is The overall reaction has DeltaH=-285.6 kJ mol^(-1) and DeltaG=-237.4 kJ mol^(-1) at 25^(@)C Suppose the concentration of hydroxide ioin in the cell is doubled, then the cell voltage will be

The middle compartment of the hydrogen-oxygen fuel cell contains, hot aqueous solution of _________.

In hydrogen-oxygen fuel cell the crbon rods are immersed in hot aqueous solution of :

A hydrogen fuel cell uses hydrogen and

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ELECTROCHEMISTRY-Exercise 2
  1. For hydrogen oxygen fuel cell at atm and 298 K H(2)g+1/2O(2)(g)rarrH...

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  2. which of the following statement is true for the electrochemical ...

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  3. Standard free energies fo formation (in kJ/ mol) at 298 K are -237.2 -...

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  4. Which of the followng reaction is used to make a fuel cell

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  5. The cell reaction of the galvanic cell Cu(s)|Cu^(2+)(aq)||Hg^(2+)(aq...

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  6. Matach column I with column II related to the figure given below and...

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  7. Which of the following reaction cannot be a base for electrochemical...

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  8. The electrochemical cell stops working after sometimes because

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  9. In a hydrogen oxygen fuel cell combustion of hydrogen occurs to

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  10. In a galvanic cell the eletrons flow from

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  11. In the electrolytic cell flow of electrons is form

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  12. What is the anode and cathode in the given in the below

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  13. What is the product produced by this cell

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  14. Mark the incorrect statement (s) for fuel cell

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  15. Which of the following statement (s) is / are true for secondary ce...

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  16. Condisder the following reactions at 1100^(@)C (i)2C+O(2) rarr 2C...

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  17. E(cell)^(@) for some half cell reaction are given below on the basis o...

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  18. The standard electrode potentials for the ractions Ag^(+)(aq)+e^(-) ...

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  19. The equation representing the process by which standard reductin po...

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  20. The emf of the cell Ni|Ni^(2)(1.0 M)||Ag^(+)(1.0 M)|Ag E^(@) for N...

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