Answer
See the answer below.
Work Step by Step
a) A sample of an ideal gas undergoes an isobaric process when its initial volume was 200 cm$^3$ and its initial temperature was 50$^\circ $C. If we know that its final temperature is 400$^\circ $C, what is its final volume
c) The final volume is given by
$$V_2=\dfrac{ (400+273)}{(50+273)} \times 200$$
$$V_2=\color{red}{\bf 417}\rm \;cm^3$$
b) We have 2 points here, $(200\;{\rm cm^3},P)$, and $(417\;{\rm cm^3},P )$
See the figure below.
