Q. The plot of osmotic pressure ($\Pi$) vs concentration (mol L$^{-1}$) for a solution gives a straight line with slope 25.73 L bar mol$^{-1}$. The temperature at which the osmotic pressure measurement is done is: (Use R = 0.083 L bar mol$^{-1}$ K$^{-1}$)
A) $25.73^\circ C$
B) $12.05^\circ C$
C) $37^\circ C$
D) $310^\circ C$
Explanation
[Solution by Claude - not from source] $\Pi=CRT$, so slope $=RT=25.73\Rightarrow T=\frac{25.73}{0.083}=310$ K $=37^\circ$C. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.