Vaporisation Definition and 14 Threads

Can anyone please help me on how to tackle this question? I really do not have any clue to make a start on it? Thanks for any help!

Homework Statement 5 moles of liquid argon undergoes vaporization at its normal boiling point (87.5 K) and the resulting argon gas is subsequently heated to 150 K under constant volume conditions. Calculate the change of entropy for this process. The standard enthalpy change of vaporization, ∆...

Homework Statement For some reason it is not letting me add the image here, here is the link to the question: http://imgur.com/a/3DLWM The part I'm stuck on is the last part. Basically, the question is to obtain the following equation for the entropy of vaporisation using the Redlich-Kwong...

In my textbook, it says that the rate of vaporisation can be increased by (a) increasing the temperature or (b) reducing the pressure. I understand why an increase in temp can lead to more molecules breaking away from the liquid and entering the vapor state. More temp = more energy = more...

Why all liquids vaporize on boiling point instead of the temperature gradually increasing along with vapor pressure and more liquid atoms evaporating? Does it have anything to do with formation of vapor bubbles?

1. Homework Statement Homework Equations First law of thermodynamics, ΔU=q+W The Attempt at a Solution Ok so, I know that when liquid evaporates, the change in volume is much greater than that when solid melts. And for both cases, distance of separation of atoms increases too, so PE...

1. Considering that not too many people have been vaporised, would you say it is murder?2. Because they are not alive anymore, does that necessarily mean they are dead? Forgetting religion, would you say having every single atom in your body separated would be death? Or Inanimation? I don't want...

Hey All, I am undertaking an experiment for a final report for a physics course at university. I have chosen to study the boiling point of water at a range of different pressures as a result of different altitudes. I am using the Clausius-Clapeyron relation after obtaining the boiling point...

Homework Statement The vapour pressure of a certain liquid is given by the equation: \log_{10}P=3.54595-\frac{313.7}{T}+1.40655\log_{10}T where ##P## is the vapour pressure in mm and T is temperature in kelvin. Determine the molar latent heat of vapourisation as a function of temperature...

Homework Statement A pupil performing an experiment finds that, when the heat supply is 16W, it takes 30 mins for the temp of the water to rise from 20°C to 100°C, and that the rate of evap is very slow even at the latter temp. Estimate an upper limit to the value of the heat capacity of the...

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...

Ive got this question but i don't know how to answer it. A steam boiler produces steam at a rate of 0.5 kg.s-1. If the specific latent heat of vaporisation of water is 2.3 MJ kg-1: (a) What power is consumed to achieve this rate? cheers

Hi, i am writing a assignment about thermal expansion and contraction and i would like to know if anyone could explain to me why the heat of vaporisation is nearly seven times that of the heat of fusion for water. I thought it might be hydrogen bonding but this is present in both the liquid and...

Homework Statement During exercise the body loses 240 W of heat due to the evaporation of sweat. Assuming that the latent heat of at body temprature is 2255 kJ/kg, determine the rate of vaporisation of sweat. answer = 106 mg/s Homework Equations L=Q/m The Attempt at a Solution...