# Would it be possible to have arrows used in chemical equations that would indicate heat, or the use of a catalyst? Maybe someone else can request others.

Feb 14, 2017

Maybe.

#### Explanation:

If by

Would it be possible to have arrows...

you mean getting such arrows as symbols or function that we can use with the math formatting, then I would have to say maybe.

The idea is that adding new characters or functions takes quite a bit of programming work, which will most likely stretch the team's already limited resources even more.

Moreover, I don't think that the team will decide to create such symbols because we can get them by using the symbols that are already available.

For example, you can add heat to a chemical arrow by using the stackrel()() function.

• without hashtags

A + B stackrel( color(white)(a)color(red)(Delta)color(white)(aaa) )(->) C + D

• with hashtags

$A + B \stackrel{\textcolor{w h i t e}{a} \textcolor{red}{\Delta} \textcolor{w h i t e}{a a a}}{\to} C + D$

Notice that I use color(white)() in the stackrel()() function to create a bit of spacing.

So if we can get this to show up without too much effort using the functions that are already available, it wouldn't make sense to relocate resources to build special symbols or functions for these situations.

Other examples of the stackrel()() function in action

• without hashtags

A + B rightleftharpoons C + D

stackrel( color(white)(aaaa) color(blue)("shift to the left") color(white)(aaaaa) )(color(red)(larr))

• with hashtags

$A + B r i g h t \le f t h a r p \infty n s C + D$

$\stackrel{\textcolor{w h i t e}{a a a a} \textcolor{b l u e}{\text{shift to the left}} \textcolor{w h i t e}{a a a a a}}{\textcolor{red}{\leftarrow}}$

• without hashtags

A + B rightleftharpoons C + D

stackrel( color(red)(rarr)) (color(white)() color(darkgreen)("shift to the right") color(white)(aa))

• with hashtags

$A + B r i g h t \le f t h a r p \infty n s C + D$

$\stackrel{\textcolor{red}{\rightarrow}}{\textcolor{w h i t e}{} \textcolor{\mathrm{da} r k g r e e n}{\text{shift to the right}} \textcolor{w h i t e}{a a}}$

• without hashtags

A + B stackrel( color(white)(a) "KMnO"_4 color(white)(aaa) ) (rarr) C + D

• with hashtags

$A + B \stackrel{\textcolor{w h i t e}{a} \textcolor{b l u e}{{\text{KMnO}}_{4}} \textcolor{w h i t e}{a a a}}{\rightarrow} C + D$