An ideal gas is compressed isothermally from 2.26 L to 0.61 L, at a starting pressure of 0.805 atm and temperature of 55.86 C.

a. How many moles of gas are present?

b. What is the final pressure (in atm) of the gas?

c. If the compression is carried out reversibly and isothermally, how much work (in J) is done on the system?

d. What is the heat flow in part 3? Remember that for an ideal gas, U = 0 for isothermal processes.