2. Draw the Lewis structure for SO2 and predict its formal charge on sulfur (S).

4. A balloon is becoming its full extent after heating the air inside. In the final stage of this process the volume of the balloon changes from 4.0 x 108 L to 4.5 x 108 L by addition of 1.3 x 104 J of the energy as heat.Assuming the balloon expand against a constant pressure of 1.0 atm, please calculate \( \Delta E \) for the process.