An engineer store $5\mathrm{.}0kg$ of ammonia in a closed and rigid glass at $20C$ and $100$kPa. Then he transferred the container in the refrigerated room while he went out for a short break. After he came back, he noticed the glass is filled with $5L$ of liquid. He checked temperature of the refrigerated room and it was found that the temperature is $-10C.$

$($a$)$ Identify the initial phase of Ammonia and determine volume of the glass.

$(2$ Marks$)$

$($b$)$ Identify the final phase of ammonia and explain why.

$(4$ Marks$)$

$($c$)$ Determine change of enthalpy during the process. Comment on your answer.

$(6$ Marks$)$

$($d$)$ Show this process on a T$-$v diagram with complete label.

$(3$ Marks$)$