$(2$ points$)$

Argon is compressed from $300$ K and $110$ kPa to $675$ K and $530$ kPa $.$ What is the change in entropy of the argon?

$($kJ$)/(($kg$)($K$))$

$(4$ points$)$

When you get your oil changed $($assume "light oil"$),$ the mechanic adds your dirty and hot $4$ quarts of oil to the recycling drum. If your oil is $200\backslash$deg F$,$

and the drum already contains $8$ gallons of oil at room temperature $(80\backslash$deg F$),$ then:

$($a$)$ What is the final temperature in the recycling drum?

$\backslash$deg F

$($b$)$ What is the total change in entropy?

$($Btu$)/($R$)$