Be sure to answer all parts. A sample of nitrogen gas expands in volume from 1.4 to 5.8 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 0.73 atm: × 10 J Enter your answer in scientific notation. (c) against a constant pressure of 4.1 atm: × 10 J Enter your answer in scientific notation.