Question

how many calories are required to completely vaporize 500 grams of water

Answer 1

What is the temperature then?

Answer 2

i have no idea

Answer 3

Hum. Let's see.

Answer 4

ok

Answer 5

Do you think that the problem asks the energy to vaporize water when it is 100 degrees C?

Answer 6

probaly it is.

Answer 7

Then \[q=mH _{v}\]
q is the energy we need.
m is the mass of water.
Hv is the heat of vaporization of water, which is a constant. Hv = 2257 J/g = 540 cal/g

Answer 8

ok thank u

Answer 9

You're very welcome.

Answer 10

what is the difference between acids and bases

Answer 11

In an acidic solution, we get lots of H+ ions. In a basic solution, we get lots of OH- ions.

Answer 12

so what does it mean by that

Answer 13

Oh, sorry. I think you haven't learned about ions yet. Let see if we can figure it out an easier way to get it.

Answer 14

im learning about it now thats why im asking question about it so much to you

Answer 15

Yes, it is important to understand it clearly.

Answer 16

i know it is to understand it clearly

Answer 17

Well, usually acids are written like this H[group]. For example HCl, H2SO4, H2CO3, etc.