(a) Calculate the work done for the reversible constant pressure expansion of 0.05 moles of helium at 2 atmospheres, from an initial volume of 0.5 L to a final volume of 2.0 L. (b) For the constant pressure expansion in (a), assuming that the gas behaves ideally, calculate the initial and final temperatures for the expansion. (c) Calculate the work done for the reversible isothermal expansion of 0.05 moles of helium at an initial volume of 0.5 L and a temperature of 273.15 K (0°C) to a final volume of 2.0 L, assuming ideal gas behavior. How does this compare to the work done for the constant pressure expansion in (a)?