How does temperature change affect water cohesion?

Question

anonymous · Answer

What do you think?

anonymous · Answer

can u just tell and stop making me do it i dont know thats why i asked

anonymous · Answer

You're supposed to answer the questions yourself. That's the whole point of them.

anonymous · Answer

well can you give me a hint or something

anonymous · Answer

Do you know what cohesion is?

anonymous · Answer

yes the attraction between molecules of the same substance.

anonymous · Answer

Right, and in water, it's because of hydrogen bonds. Now, what happens to bonds when you increase the temperature? Do the molecules stay closely bonded together or do they vibrate a lot and move further apart?

anonymous · Answer

they vibrate a lot and move further apart

anonymous · Answer

Right. So how would this affect cohesion (given that cohesion has to do with the molecules being attracted to each other)?

anonymous · Answer

there would be less cohesion the higher the temp and im thinking the colder the stronger the bond gets

anonymous · Answer

I think so too. And I just googled and found a graph showing that water's surface tension (which is the result of cohesive forces) does indeed go down with a higher temperature. It makes sense, doesn't it? I mean, if water became MORE cohesive when the temperature went up, how would it ever boil?

anonymous · Answer

you just answeres to of my questions in 1 thx