ANSWER PROBLEM $9$ ONLY:

$8)$ Water is being heated in a vertical piston$-$cylinder device with a height of $20cm.$ The piston has a mass of $20kg$ and a cross$-$sectional area of $100c{m}^2.$ If the local atmospheric pressure is $100$kPa, determine the temperature at which the water starts boiling.

$9)$ For problem $8,$ we wish to increase the boiling temperature by $20C.$ What change to the device would you recommend making? Quantify the change. $($that is$,$ calculate the numerical change that you recommend$).$