To denote standard state like enthalpy of formation in standard state, or change in Gibbs free energy in standard state, we use a degree-like symbol above the $G$ as in $\Delta G^0$. How should I refer to this superscript in spoken language?
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That's not a degree at all, but a zero. – Ivan Neretin Sep 19 '17 at 11:02
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Then how should i pronounce it ? "g zero" ? – thephysicist Sep 19 '17 at 11:46
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4What about G nought (or G null or G sub zero) and G prime? – Paul Sep 19 '17 at 12:02
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3I heard people pronounce like that "G nought" and "G prime" . But I am not sure these are the right ones. – thephysicist Sep 19 '17 at 12:05
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2There is no authority-on-high for English language usage. I suspect that "G nought" and "G prime" were understood (or are perfectly understandable) by one and all, so are quite OK to use. Nobody will issue you a language ticket... – Jon Custer Sep 19 '17 at 14:06
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G-zero and G-prime.
G-zero has also in my presence been referred to as "G-ought", "G-nought", "standard-G" or "G at standard state". I am particular towards "G-zero" myself. (Mostly because of a witty limerick I heard during my studies. Zero rhymes with hero.)
Stian
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