2007-09-23 16:28:04 · 5 answers · asked by Song Cry 2 in Science & Mathematics ➔ Chemistry
easy.
does water boil on its own? NO you ADD heat and therefore it is endothermic
do you get a new chemical from boiling water? no you get H2O(g) just water vapor.
You changed the state of matter only, not the molecular composition
2007-09-23 16:33:41 · answer #1 · answered by intrepid_mesmer 3 · 0⤊ 0⤋
endo sounds like into
exo sounds like exit.
Heat flows into water to make it boil. Hence endothermic.
Boiling water is Liquid Water to Water Vapor. Same chemical, i.e. water. So the change must be physical.
Robert & Kokulia are correct, wah hoo is confused.
2007-09-23 23:42:29 · answer #2 · answered by Phoenix Quill 7 · 0⤊ 0⤋
exothermic, its the heat is from an outside source , and its a physical change, the water does not change its chemical composition, just its state
2007-09-23 23:38:04 · answer #3 · answered by Anonymous · 0⤊ 0⤋
its an endothermic reaction, as it absorbs heat...its a physical change, from liquid to gas...
2007-09-23 23:34:16 · answer #4 · answered by Kokulia 1 · 0⤊ 0⤋
endothermic
a physical change
2007-09-24 12:45:05 · answer #5 · answered by veondra r 1 · 0⤊ 0⤋