In the van der Waals equation, 'a' accounts for the attractive forces between molecules, while 'b' is the volume excluded by the molecules themselves. But honestly, in my exam, I just remember them as correction terms to the ideal gas law to make it real. It's like our old house—'a' is the pull that keeps us together, and 'b' is the stubborn leak in the terrace that takes up space I can't use, both things you can't ignore when the monsoon comes. The theory is neat, but it's the tangible pressure and repair that make you understand constants.
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