Question

Are these right?

Which of the following factors does NOT affect the behavior of a gas in a closed container?

the number of particles
the average kinetic energy*
the cohesive forces within the gas
the size of the container

Which is NOT a possible sign of a physical change?

change in appearance
change in volume
the release of energy*
change in color

Which of the following types of substances would be least likely to dissolve in water?

nonpolar molecule like cholesterol*
polar molecule like ethyl alcohol
ionic compound, such as magnesium chloride
polar mole like the

Answer 1

1. the cohesive forces within the gas
2. change in volume
3. nonpolar molecule like cholesterol

Answer 2

although 2. im unclear...

Answer 3

I'm pretty sure it's the release of energy because that's for chemical change.

Answer 4

and freazing of ice? there is energy released!

Answer 5

Yes, that's what threw me off to but no where in my book does it say that release of energy is physical change.

Answer 6

earlier somebody also asked that question and i must say that i dont know! but then also my guess isnt right...

Answer 7

That's alright. I'm just going to go with my answer because for Chemical Change is says that a sign for it is is the release or gain of energy and not for physical change.