Kitchens, lakes,
foundries — Black 1760s
foundries — Black 1760s
Changing form costs heat. The thermometer can stall. Some changes skip the liquid (smältpunkt, kokpunkt, avdunstar, kondenserar, sublimerar).
Open
Chemistry
Chemistry is what stuff is made of — and what happens when you heat it, mix it, or try to take it apart. Stuff versus a mix; hard, pourable, air; ice, water, steam as the same water.
Same kitchen,
two kinds in the bowl
two kinds in the bowl
Two kinds in one place
Oil on water stays two. Sugar in tea does not. Tool: mix versus one stuff (blandning / rent ämne).
Why this comes next: you can already change form. Next is noticing that some bowls are not one stuff.
Locked
Filters, pans,
scrap yards
scrap yards
Taking mixes apart
Use a difference: size, boil, float, magnet. Not a new shape of the same stuff — a separation.
Why this comes next: once you can name a mix, the job is to unmix it.
To be developed
Fire, rust,
baking
baking
New stuff, not just a new shape
A change that does not reverse by cooling. Tool: reaction (kemisk reaktion).
Why this comes next: melt is the same stuff. This is not.
To be developed
Stop. This is as far as we go by hand. Past here you need a specialist’s tools. No orbitals as a method, no plant-scale chemistry as a toolkit. If a later page needs those, it has left this river.
Helper side path (not this river): The tiny hard centre — Rutherford, isotopes, Bohr shells.