In a versus plot for a fixed mass of gas at constant pressure (isobars), if multiple lines are drawn — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

From the ideal gas equation $V = (nR/P)T$, the slope $m$ of the $V$ vs $T$ plot is $nR/P$. Since the slope is inversely proportional to pressure, the highest pressure ($P_1$) will have the lowest slope ($m_1$). Hence, $m_3 > m_2 > m_1$.