A balloon is inflated from a negligible initial volumeto a final volume of 200 cm3. How much work isdone by the balloon on the surroundings if the pressureopposing the expansion isA. P = 1 barB. P = 0.5 barC. P = 0 barD. P = 3 barE. Can you think of locations where each of the“surroundings” pressures given in parts A–Dwould be realistic?

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