Question

The volume-temperature graphs of a given mass of an ideal gas at constant pressures are shown below. What is the correct order of pressures?

• A. $p_{1}>p_{3}>p_{2}$
• B. $p_{1}>p_{2}>p_{3}$
• C. $p_{2}>p_{3}>p_{1}$
• D. $p_{2}>p_{1}>p_{3}$

Answer 1

Answer: (B)

Drawing a constant temperature line parallel to 'V' axis, the isobar at higher volumes will be at lower pressure as $\text{P} \propto \frac{1}{\text{V}}$ at constant temperature.