1. The temperature of three moles of an ideal gas 373 K. How much work
does the gas do in expanding isothermally to four times its initial
volume.

2. Six grams of helium (molecular mass= 4.0 u) expands isothermally at
370 K and does 9600 J of work. Assuming that helium is an ideal gas,
determine the ratio of the final volume of the gas to the initial
volume.

3. A mono atomic ideal gas (y=5/3) expands adiabatically, and the ratio of
its initial to its final Kelvin temperature is Ti/Tt= 2.00. Find the
ratio of its initial to its final pressure Pi/Pt.