Recent content by Musimatician

I think that it's stable BECAUSE of the condensation/evaporation cancelling out, isn't it? That's the point of a saturated vapour pressure? But anyway, how long does it take to get to this stage?

ah, thanks anyway. Know any way to get the attention of those who do?

Yeah, that sounds right. But what about before equilibirum? I mean, it doesn't reach that state instantly, does it?

Hmm... I've calculated that the space in the cup will hold 3.2g of water/coffee vapour. But now, is there a way to calculate the rate of heat loss? The speed at which the liquid evaporates?

I saw this page. But how do we calculate the mass or moles of particles in the vapour state? How do we equate pressure to actual amount of substance?

Just wondering - if you have one of those cups of coffee with a lid on it, how much of the liquid would evaporate (assuming reasonable figures for the size of the cup and temperature of the liquid or whatever other variables are relevant)? Since it's essentially a sealed container, I'd assume...