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September 19, 2014

September 19, 2014

Posted by **Syed** on Tuesday, October 9, 2012 at 8:32pm.

-----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) (11.20L-2.0L)

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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