Recent content by alexithymia916

oh geeeez pardon my ignorance... thanks so much :)

noo def not my teacher HATES significant digits, so we're just supposed to carry it out about 5 decimal places grr i can't figure this one out :(

okay so if it's work being done on the gas.. then the equation should be Change in Internal energy = Q-W but you don't have specific heat or final or initial temperature..

Homework Statement One mole of hydrogen gas is heated from 278 K to 390 K at constant pressure. Hydrogen has a specific heat of 43.6 J/mol*K. The universal gas constant is 8.31451 J/K mol. Calculate the change in the internal energy of the gas. Answer in units of J Homework Equations...

Homework Statement One mole of gas is initially at a pressure of 3.9 atm, volume of .29 L and has an internal energy equal to 108.1 J. In its final state the gas is at pressure 1 atm and volume .7 L, and its internal energy equals 169 J. (There are 6 different questions using this data)...

ok well i solved it but its still wrong... i got 1 atm as the average value of atmospheric pressure which is 101300 N/m^2 so i set up a proportion so it should be 7091 N/m^2 or 7091 Pa + the 4200 Pa from above which is 11291 Pa.. which is still wrong? :(

ohhh err.. how do i find that? =(

Okay well using what you said above.. (i did something similar to that in the first place but the answer was incorrect...) [i submit the answers online for credit and i have 2 attempts of getting the right answer] f=ma so 30 kg * 9.8 m/s^s = 294 N of force from the piston working on the...

:mad:Homework Statement A vertical cylinder of cross-sectional area .07 m^2 is fitted with a tight-fitting, frictionless piston of mass 30 kg. The acceleration of gravity is 9.8 m/s^s. If there are 1 mol of an ideal gas in the cylinder at 395 K, find the pressure inside the cylinder. (Assume...