[MercuryHg]

A helium-filled balloon at 1.00 atm pressure has a volume of 1.350 L. It is placed in a freezer and its volume decreases, stopping at 1.010 L.
(Assume that the static internal and external pressures are equal, that the balloon contains only helium, and helium behaves as an ideal gas.)
Calculate delta E for the gas in the balloon.
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I have started this question, and since it is at constant pressure, volume changes, so this means work is done.
To calculate work. w=-PdeltaV
w=(-1.00)(-0.340)
w=0.340atmL
Convert to Joules 0.340atmL x 101.33J/atmL = 34.5J

Now I have w for the equation E=q+w, but how do I get q?

Thank you.