Thermodynamics HW Questions

[DWizzleWolf]

Ok so I have a bunch of questions that I need help with so I am just going to make one big post, all the help I can get is appreciated!!!

 

1) A cylinder contains 3.0 kg of a water mixture that is in two phase equilibrium at a pressure of 500 kN/m². If the volume of the cylinder is 1.0 m³, determine the following:

a) Temperature of the mixture in the initial equiulibrium.

b) Volume and mass of liquid water.

c) Volume and mass of vapor

 

2) A cylinder has a volume of 0.2 m³ of O₂ at 70 C and 25.0 bars. Calculate the amount of O₂ in the container if the atmospheric pressure is 1.0 bar.

 

3) Calculate the work necessary to compress air in an insulated cylinder from a volume of 2.0 m³ to a volume of 0.2 m³. The initial temperature and pressure are 20 C and 200 kPa, repectively.

 

Thanks!

[studiot]

So what have you achieved so far, and have you read the rules of homework help?

 

http://www.scienceforums.net/topic/75772-read-this-before-posting-in-homework-help/

 

Don't forget to convert temperatures to absolute before doing any calculations.