Evaporation Definition and 215 Threads

Hi guys I am slightly confuse about a statement in the kinetic explanation for evaporation as well as melting. Firstly for the evaporation: "Thus the latent heat supplied in causing evaporation represents the potential energy gain of the escaping molecules plus the work needed to expand...

I am in my first year of the IB Diploma and I have chosen Higher Physics and want to do my extended essay in Physics. Is fluid dynamics (or fluid mechanics i.e. how things fall in water and why) better or is analyzing the effect of colors on the rate of evaporation better? This essay has to be...

Hey. If i jump out of a swimming pool, into a breeze, i feel cold. Is this because the breeze is moving the more moist air away from my body, allowing more evaporation to occur, cooling the water, and since two substances of different temperatures naturally want to equalize in temperature...

my biggest problem is the word problems. i can't figure out how to write the equation so that i can do the math... Heat is escaping at a constant rate (dQ/dt is constant) through the walls of a long cylindrical pipe. Find the temperature T at a distance r from the axis of the cylinder if the...

A few days ago i took a test on heat and temperature ect. One of the questions was : When we say evaporation is a cooling process, we are saying that: a. surrounding air is cool b. the liquid is cooled. I chose a. because i knew that evaporation draws in energy from air to evaporate cooling the...

Does anyone know the most usual unit for evaporation speed? Is it kg/(m2*s)?

Evaporation and Condensation... If 58 grams of hot water at 71°C is poured into a cavity in a very large block of ice at 0°C, what will be the final temperature of the water in the cavity? in °C How much ice must melt in order to cool the hot water down to this temperature? in grams is...

this seems to be an interesting paper, though I can't tell for sure (don't understand the idea of naked singularity well enough, how you can have one) http://arxiv.org/abs/gr-qc/0506129 Quantum evaporation of a naked singularity Rituparno Goswami, Pankaj S. Joshi, Parampreet Singh 4...

Any takers approximating evaporation rate?! I am trying to estimate the rate of water loss from a 13'L x 6'W x 6'D mixing container at room temperature under a 12 inches of mercury vacuum. There is constant mixing of the fluid (dirty water). There is 180 cfm air movement through the top of...

http://arxiv.org/abs/gr-qc/0504029 Black hole evaporation: A paradigm Abhay Ashtekar, Martin Bojowald 18 pages, 4 figures IGPG04/8-4, AEI-2004-072 "A paradigm describing black hole evaporation in non-perturbative quantum gravity is developed by combining two sets of detailed results...

I don't know a lot about this topic so corrections are solicited. My understanding is that black holes evaporate by Hawking radiation. Hawking radiation, by my reading, occurs when a pair of virtual particles emerges very close to but just outside the event horizon of the black hole. When...

I need to know: In a closed system sealed off from outside air, if water from a mass of basic water evaporates, will the pH of the air be affected? If so, when the air condenses, how wil the pH of soil in the closed system be affected? Thanks for the help.

How would someone go about creating a large NaCl crystal? Is there a special evaporation technique involved with a saturated solution? As a side question why is sugar in crystal form? I mean isn't sugar a covalently bonded molecule?

I'd like to know if there's any law/formula that allows you to calculate the evaporation speed of a liquid at a precise temperature, pressure, with a precise surface. Which physical parameters of the substance should i know? Thank You! Ciao! Andrea

Does anyone know the formula that describes the evaporation rate of water? I'm assuming it involves temperature, dew point, relative humidity and other factors. Thanks in advance.