Which areas of chemistry require calculus? I didn't have much chemistry in school/college, and am now building up my knowledge again. I am studying maths in parallel, building up to calculus.

I noticed that the introductory chemistry books (even at the college level) don't use any calculus. However, more advanced books do tend to use calculus.

Can anyone tell me which areas of chemistry require (or make use of) calculus?
For first year college chemistry the only calculus, if there is any at a particular school, would be reaction rate equations.

$\mathrm{d}[A] = -k[A]\mathrm{d}t$ ;  $\mathrm{d}[A] =-k[A^2]\mathrm{d}t$ for example

Then second year you take organic chemistry; no calculus.

In the third year, thermodynamics has some multivariable calculus (partial derivatives) and quantum mechanics has partial differential equations.