Amperage calculation

Knowing the amperage and how long it is being applied (seconds), the coulombs can be calculated. Then the coulombs can be converted into moles of electrons, and the moles of electrons can be related to the moles (and then grams) of material being electrolyzed through the balanced half-reaction. 

This seems like a rather large loss for a small, 2-psi pressure drop. But after the filter basket was pulled and cleaned, and the compressor was returned to service, the accuracy of the calculation was proved. About 10 percent more moles of gas could be handled, with approximately the same amperage load, on the electric motor driver. A nice example of the Second Law of Thermodynamics in action. 

Almost never take a person s word for the water recirculation rate. Check the number of pumps available and the number operational, read the pump plate, use pump curves, read the pump manual, measure using pitot tubes (measures the total pressure and hence indirectly the velocity), orifice plates, V-notch weirs, and distribution deck levels, or calculate based on amperage draw and the discharge pressure, to confirm the volume of water actually circulating in the system. 

In a typical analysis the columns are cooled to about —75° C. by dry air precooled by liquid N2. Then the gas sample is injected into one column by a Perkin-Elmer sampling valve the second column is for reference. After sampling is complete, the liquid N2 is removed, and the air flow is continued for about 5 minutes or long enough to warm the columns to about —10° C. and remove the 03. Yields, as percent of current, are calculated from the gas chromatographic, amperage, sample volume, and total gas flow measurements. 

There are formulas to calculate gas production output under ideal conditions. These calculations are handy to make comparisons with your field and bench tests. For instance, to calculate the output of hydrogen and oxygen during an hour, first, measure the voltage at the electrolyzer terminals during operation. Then measure the amps as indicated earlier. Then, multiply the voltage times the amperage to get the power draw of the electrolyzer in watts. 

Voltage and amperage of the electrodialysis cell and calculated electrical resistance of the electrolyte and current density in the electrolyte cell compartment... 

What is the series circuit s total current flow (amperage) (Hint Use the total resistance calculated above with the total voltage of 12 volts.)... 

Plan Figure 20.31 provides a road map of the problem. First, the product of the amperage and the time in seconds gives the number of coulombs of electrical charge being used (Equation 20.20). Second, the coulombs can be converted to faradays (1 F = 96,500 C/mol e, which tells us the number of moles of electrons being supplied. Third, reduction of 1 mol of Al to A1 requires 3 mol of electrons. Hence we can use the number of moles of electrons to calculate the number of moles of A1 metal it produces. Finally, we convert moles of A1 into grams. 

In a plant with galvanic bath for electrolytic copper-plating of steel specimens, 5.00 kg of copper, Cu(s), per hour are precipitated. The precipitation takes place due to reduction of Cu++(aq) from a sulphuric solution. Calculate the amperage / (A) supplied during operation of the plant ... 

Consider a galvanic bath in operation. Due to the current in the electrolyte, 8.50 mol Zn (aq) of ions per hour are transferred through an imaginary sectional plane in the bath. Calculate a) the electric charge Q (C) transferred per hour by Zn" " ions, and b) the amperage I (A) related to this transfer of Zn" " ions ... 

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