What energy should be spent to fill a balloon with a lifting force of 3000 N with hydrogen under normal conditions? How much will it cost at the price of 4 copecks per kW.h? Ignore the heating of the solution in the course of electrolysis.

What energy should be spent to fill a balloon with a lifting force of

1.	What energy should be spent to fill a balloon with a lifting force of 3000 N with hydrogen under normal conditions? How much will it cost at the price of 4 copecks per kW.h? Ignore the heating of the solution in the course of electrolysis.
Answer» Solution :The LIFT `F=(rho_(0)-rho_(H))Vg`, where `rho_(0)` is the density of AIR and `rho_(H)` the density of HYDROGEN. The mass of hydrogen is `m=rho_(H)V=rho_(H)F//g(rho_(0)-rho_(H))`. Applying Faraday.s law, we find the charge Q passing through the electrolyte solution. The energy required to produce the hydrogen is where Q represents the Joule heat loss. The polarization e.m.f. has already been FOUND in Problems 32.5.

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What energy should be spent to fill a balloon with a lifting force of 3000 N with hydrogen under normal conditions? How much will it cost at the price of 4 copecks per kW.h? Ignore the heating of the solution in the course of electrolysis.

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