Chemistry
posted by Syed .
A gas is allowed to expand at constant temperature from a volume of 2.00 L to 11.20 L against an external pressure of 1.500 atm. If the gas loses 256 J of heat to the surroundings, what are the values of q, w, and ΔU? Pay careful attention to units.
My attempt:
q = heat
so if the gas losses 256J of heat then that makes
q=256J
as for w
w = p (delta V)
w = ( 1.5atm) (11.20L2.0L)
w = 13.8atm (convert this to J)
w = 13.8atm * (8.3145 J K^1 mol^1)/(0.08206 L atm K^1 mol^1)
w=  1398.2J?
then Delta U = q + w
delta U = 256J + (1398.2J)
delta U = 1654J?
Is this right?
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