Calorimetry.....

Question

A sample of gas is placed into an enclosed cylinder and fitted with a movable piston. Calculate the work (in joules) done on the gas if it is compressed from 15.43 L to 8.56 L with a pressure of 4.19 atm.

Answer 1

Jessica ... you posted NINE questions in a row all dealing with calorimetry. I answered the first one, and will do this one as well. But you really should attempt to do them yourself, and if you have trouble, post the problem with what you've done and where you are having difficulty. We are here to help, but NOT to do your homework.

w = P∆V

w = work = ?

P = 4.19 atm

∆V = 8.56 L - 15.43 L = -6.87 L

Solve for w

w = -4.19 atm x -6.87 L

w = +28.79 Latm (note the sign is positive b/c the surroundings are doing work on the system)

Converting to joules we have..

w = 28.79 Latm x 101.325 J / Latm = 2917 J