Is dissolving coffee powder in hot water a chemical?

Answer 1

I think so because I put some coffee powder into a cup with a little bit of water but still dissolved into brown stuff

Answer 2

No because if you put water in a pan and then ad coffee powder and evaporate it the coffee powder won't evaporate with it.

If the powder does not settle to the bottom if left undisturbed for a while, then it is in solution (dissolved). Solutions can be of either a physical or chemical nature. Salt water is a solution as well, despite that salt will be left behind if the water evaporates.

Answer 3

yes because the coffee blends in with the water (h20) and it is also cloudy and misty

this is coming from a 12 year old boy who comes from hulme hall grammer school in cheadle hulme my name is christopher

Answer 4

Only instant coffee granules are water soluble. Regular coffee grounds are "woody" and do not dissolve in water. Hot water will make the components in coffee granules come out, but parts of the beans will remain.

Answer 5

Dissolving is generally an endothermic process, meaning that it requires energy to go to completion. Considering the dissolving/disassociation "reaction," the final energy state is higher than the initial. Therefore, adding heat to the system (in this case, your coffee) will shift the reaction to the right (toward the dissolved, steaming, delicious product).

Another way to see it would be in terms of crystal lattices. The molecules that make up your coffee powder are actually in a lattice of individual molecules. The intermolecular forces aren't particularly strong in this case (as opposed to something like table salt, which is an ionic crystal lattice), but they are still strong enough such that some energy is required to break them apart. That energy is provided through the heat of the water.

Answer 6

No, dissolving coffee powder in hot water is a physical change. The coffee powder does not undergo a chemical reaction when it dissolves in water; it simply disperses evenly throughout the water to form a solution.

Answer 7

No, it is not a chemical reaction. It is a physical reaction. The coffee is not actually changing as you could let the coffee sit for a long time and it would be like it was in the beginning.

Answer 8

Yes