Hello everyone! I have trouble finding the answer to the following problem - this really bugs me. Can anyone give me a hint?(adsbygoogle = window.adsbygoogle || []).push({});

Here is the problem:

A vessel contains a hole of 0.1mm^2 above the liquid level (contains liquid mercury) at T=0°C. The vessel is contained within a very much larger vessel in which a very high vacuum is maintained. After 30 days it is found that 24mg of mercury have been lost from the inner vessel. The relative atomic mass of mercury is 201.

I have already calculated the average speed of the mercury atoms in the vapor to be

[tex] 169 m/s [/tex]

now the questions:

1)What is the mean rate of flow of mercury atoms through the hole?

2)hence calculate the vapour pressure at T=0°C

note:

the numerical answers are:

1) 2.76 * 10^13 atoms/sec

2) 2.5 * 10^(-2) N/m^2

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Rate of flow through a hole

**Physics Forums | Science Articles, Homework Help, Discussion**