Grinding coal into powder is what kind of change? | Yoo ...
Nov 22, 2011· Grinding coal into powder is what kind of change? achemical . bphysical . cmass . ddensity ... you take coal, smash it to powder and you still just have tiny chunks of coal. So the change is purely physical. Mass theoretically stays the same, assuming you didn''t loose any powder and density could change or stay the same depending on the ...