Question

What will be the minimum pressure required to compress $500d{m}^3$ of air at 1 bar to $200d{m}^3$ at $30^{\circ }C$?

• A. $3.5$ bar
• B. $1.5$ bar
• C. $2.5$ bar
• D. $0.5$ bar

Answer 1

Answer: (C)

According to Boyles law, at constant temperature $P_1{V}_1=P_2{V}_2$
$\therefore P_2=\frac{P_1{V}_1}{V_2}=\frac{1\times 500}{200}=2.5$ bar
Thus, the minimum pressure required $=2.5$ bar