Krypton is contained in a closed cylinder fitted with a weightless piston at 243 K and 1 bar.

Heat is added under constant pressure until the volume has doubled in size. Calculate the

amount of work necessary for the reversible expansion of krypton.

Assume krypton is an ideal gas. From Appendix B in the text, we can assume the heat capacity

of krypton is independent of temperature and Cp = 2.5R, where R is the molar gas

constant R = 8.314 J/(mol K). For an ideal gas, recall Cy = Cp-R=1.5R.

Report your answer in units of kJ/mol using three decimal places. Note that we have

expansion, which corresponds to the system performing work on the surroundings. Use this to

check the sign (positive or negative) of your answer.