# Tag Info

## New answers tagged energy

1

Size matters in batteries. The bigger the electrode surface area more current can be drawn. A very simple example is that of ten 1.2 V pencil cells connected in series at home vs. a 12 V lead-acid battery. Which one can start a car? The lead-acid battery-although the voltage of both batteries is the same. Not only does size matter, but the rate of electron ...

3

After some digging around on Google Scholar, I came across the following article: https://pubs.acs.org/doi/abs/10.1021/ja00499a052 which presents the following class of reactions: All of these reactions are endothermic in that they have positive molar enthalpies, and also produce near-infrared light at around 1000 nm. Reaction 1 (i.e. $\ce{R_1} = \ce{H}$) ...

2

EDIT: Read the comments by @theorist for why the answer below has problems, and check here to read about the opposing views associated with defining the entropy of the entire universe (literally, not as abbreviation for system plus surrounding). $$ΔG = T_\mathrm{system} \cdot ΔS_\mathrm{total}$$ This equation is incorrect, as the following counterexample ...

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