Question

Answer the questions based on the diagram.

The pressure at $A$ and $B$ in the atmosphere are respectively:

• A. $0.821$ and $1.642$
• B. $1.642$ and $0.821$
• C. $1$ and $2$
• D. $0.082$ and $0.164$

Answer 1

Answer: (A)

The correct option is A $0.821$ and $1.642$
According to ideal gas equation, we have;

$PV=nRT$

to calculate pressure at A, we have

$P=\frac{1\ast 0.0821\ast 200}{20}=0.821$

to calculate pressure at B, we have

$P=\frac{1\ast 0.0821\ast 400}{20}=1.642$