A sample of nitrogen gas expands in volume from 1.7 to 5.4 L at constant temperature. Calculate the work done in joules if the gas expands (a) against a vacuum:     J (b) against a constant pressure of 0.71 atm:      ×  10    J Enter your answer in scientific notation. (c) against a constant pressure of 4.7 atm:      ×  10    J Enter your answer in scientific notation

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