If the standard free energy change for combustion of 1 mole of a gaseous fuel is -856 kJ/mol and the number of electrons involved in the reaction is 8 mol, calculate the standard voltage that could be obtained from a fuel cell using this fuel.
Answer to 3 decimal places. Use F = 96485 C mol-1
2007-10-11 00:10:48 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
- delta G/(n x F)
Just put the numbers in, remembering to put delta G in J/mol.
2007-10-12 10:59:12 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋
think of of it this way. in case you wanted to evaluate piles of footballs and table-tennis balls, you would be wanting to renowned how many have been in each and each pile, not the burden of the pile. If there have been equivalent numbers, for sure the pile of footballs might weigh extra. same with molecules. The mole is the quantity of in spite of-it-is that features a definite form of atoms (see different answerers for the definitely form). So a mole of hydrogen (H2 = a easy molecule) weighs lots below a mole of lead sulphate (case in point). The mole isn't a fixed mass, subsequently, yet a distinctive mass for each substance in accordance to its molecular weight. while issues react chemically, that's the numbers of distinctive molecules that matter. that's why the mole is significant in chemistry.
2016-10-22 00:36:00 · answer #2 · answered by Anonymous · 0⤊ 0⤋