Volt-coulomb

Energy, Work, Heat 1 joule = 1 volt-coulomb = 1 newton meter ... 

Faraday s constant, F = 96,500 coulombs per mole of electrons Gas constant, R= 8.31 volt coulomb mol-1 K 1... 

VC volt-coulomb Vixorite Span expl(Resina explosiva)... 

I joule = l volt coulomb (the Si-approved unit of energy) l calorie = 4.184 joules (the so-called mechanical equivalent of heat)... 

These results are strictly true only if the ampere, volt and ohm are in absolute units there is a slight difference if international units are employed, the absolute volt-coulomb or joule being different from the international value. The United States Bureau of Standards has recommended that the unit of heat, the calorie, should be defined as the equivalent of 4.1833 international joules, and hence... 

The difference in electrical potential between two points is defined as the amount of electrical work required to move a unit of positive charge from one point to the other. If the charge is measured in coulombs and the electrical work in joules (volt-coulombs), the potential difference is measured in volts. If an arbitrary point (say, at infinity)... 

Formerly it was assumed that the electromotive force of a galvanic cell, and also the chemical affinity, could be calculated directly from the heat of reaction. W. Thomson and Helmholtz stated this as a consequence of the law of the conservation of energy in the form nE = Q. In the case of the Daniel cell this equation was found to be in agreement with experiment. The electromotive force of a Daniel cell was found to be 109 volts. The maximum electrical energy which can be obtained by the interaction of 1 mol. of Zn-i-CuSO, as calculated by this equation, is therefore 2x1-09x96540 volt coulombs = 2 X 1 -09 X 9654 x 0-24 cal. = 50000 cal. approximately, and this is nearly the same as the heat of the reaction... 

In order to calculate K, which has the dimensions (zero) of a pure number, we must express Eq and R in the same system of units. In electrochemical units in which E and R are expressed in volt coulombs, we have... 

Thermal system. The unit of heat is the amount of heat necessary to raise 1 gr. of water from 14-5° to 15-5° C. (15° calorie). On p. 79 we found that 1 cal. = 4 19 x 10 ergs = 4-19 volt-coulombs. The technical unit is the great calorie ... 

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