1 mole of an ideal gas undergoes reversible isothermal expansion from an initial volume of ${ V }*{ 1 }$ to a final volume of 10
${ V }*{ 1 }$ and does 10 kJ of work. The initial pressure was 1 x ${{10}^{7}}$ Pa.

(i) Calculate ${ V }_{ 2 }$

(ii) If there were 2 moles of gas, what must its temperature have been?