Question

1) a) What is the difference between open and closed systems, explain on 2 examples each.

b) Show the processes applied to an ideal gas on the P-V diagram with their names.

2) 10 kg of air is contained in a constant volume container at a temperature of AAC and a pressure of 150kPa. How much air is pressed into the container, its pressure is 250kPa and its temperature is BBC? (AA and BB are a two-digit number ending in 0 or 5)

Answer 1

$\frac{p_1}{T_1}=\frac{p_2}{T_2},$

$p_1V=\frac mMRT_1,$

$p_2V=\frac {m+\Delta m}MRT_2,$

$\Delta m=6.7~kg.$