Recent content by deeko1987

anyone?

Homework Statement A gas obeys the equation of statez=1/(1-b(molar density)) What is the molar entropy change of expanding this gas from a volume of 1 dm3 to 2 dm3 at a temperature of 300 K, given b = 0.2 dm3? Calculate your answer to three significant figures and select one answer from the...

Homework Statement We have 0.0008 Kmol of an ideal gas are expanded from V1 to V2 v2=3V1 process is reversible and T/V=Constant if the work obtained by this expansion is 9.4 KJ find the initial temperature R=8.314 KJ Kmol-1 Homework Equations PV=nRT possibly T/V = T/V The Attempt at a...

I'm still hitting a brick wall with this one. as I have a equivalent; x+y=a value and X*Y=a value I cannot substitute or eliminate to isolate one of the variables. Do I need a third variable or formula? any help would be appreciated Deeko

the charges must be positive because the combined charges (q1 + q2) is positive. and they are repelling which off the top of my head is a positive value and a negative suggests they are attracted (will double check). Still struggling with this equation but I'll work through it. Its most likely...

Hi thanks for the welcome, I have used coulomb's force to work out the value of q1 x q2 which = 7.51x10^-11 and I know the combined value of q1+q2 = 20x10^-6 I'm not sure where I would go from there as the post above says its not necessary to use all the equations. Would it be wise to...

1. two point charges q1 and q2 with a combined charge of 20 micro coulombs are placed 3m apart. If one repels the other with a force of 0.075N calculate; the value of q1 and q22. k=8.987x10^9 F=kxq1xq2/r^2 E=kQ/r^2 E=f/q3. I've tried to work out the charge by working out the...