Recent content by Niksha

Ok, I'm pretty sure now that Q = V (p1 - p2) and I agree with U2 - U1 = cv T (m2 - m1) = ...which gives... = - (p1 - p2)(cv V)/R. Folloving the same approach, I have calculated the work ---- dw = p dv multiplying with mass m dW = m p dv = m p d( (RT)/p) = ( (pV)/(RT) )...

Thanks guys. I'm puting this on paper so I can check solutions. I have managed to do something on my own and I have found similar example in one book (this one is with p=const). I will check everything than post back. See ya!

Homework Statement Tank contain an ideal gas. Known is type of gas, temperature of gas T, volume of tank V=const, pressure of gas in tank p1, and the temperature of surrounding air T (same as temperature of gas in the tank). That is state 1. Tank has small valve that was not closed...