A$)$ Classify each following statement as true or false:

$($T$)($F$)$ Temperature, pressure, and specific internal energy are intensive properties of the system.

$($T$)($F$)$ For a closed system process with negligible kinetic and potential energy changes, the first law equation

can be written as:

$Q_{\text{n}\text{e}\text{t}\text{,}in}-W_{\text{n}\text{e}\text{t}\text{,}\text{o}\text{u}\text{t}}=U$

B$)$ Please circle the correct answer:

The density of ethanol is $783k\frac{g}{m^3}.$ Which of the followings represent its specific gravity:

$($a$)0\mathrm{.}00128\frac{m^3}{k}g$

$($b$)7681\mathrm{.}23\frac{N}{m^3}$

$($c$)0\mathrm{.}00128$

$($d$)0\mathrm{.}783$

$($e$)0\mathrm{.}783k\frac{g}{m^3}$

Note: density of water $=1000k\frac{g}{m^3}$

A vacuum gage connected to a system reads $740mmHg.$ The barometric reading is $760mm$ of $Hg.$ The

absolute pressure of the system is approximately: $[$Note: density of mercury $=13600k\frac{g}{m^3})$

$($a$)98\mathrm{.}7$kPa

$($b$)101\mathrm{.}3$kPa

$($c$)102\mathrm{.}5$kPa

$($d$)2\mathrm{.}7$kPa

$($e$)-102\mathrm{.}5$kPa

Which of the followings can be considered an open system:

$($a$)$ Compression of air in a sealed balloon by squeezing

$($b$)$ A tightly sealed classroom

$($c$)$ Expansion of gas in a piston cylinder system

$($d$)$ Filling a car tire with air at a service station

$($e$)$ Heating up a meal in a pressure cooker

A container filled with an ideal gas at an initial pressure of $1\mathrm{.}5$atm. The gas is compressed isothermally to a final

volume that is one$-$fourth of its initial volume. What is the final pressure of the gas?

$($a$)2$ atm

$($b$)3$atm

$($c$)4$atm

$($d$)5$atm

$($e$)6$atm

An ideal gas system has an initial internal energy $(U_1=Y)$ and is then compressed to one$-$half of its initial

volume while the temperature stays the same. What is the final internal energy $(U_2)$ of the ideal gas in terms of $Y?$

$($a$)Y$

$($b$)\frac{1}{2}Y$

$($c$)\frac{1}{4}Y$

$($d$)2Y$

$($e$)4Y$