What is the value of the absolute zero of temperature on their temperature scale? — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

$PV_m = RT_{abs}$. Let $T_{abs} = T_N + x$. At 0°N: $28 = Rx$. At 100°N: $40 = R(100 + x)$. $100R + Rx = 40 \implies 100R + 28 = 40 \implies R = 0.12$. $0.12x = 28 \implies x = 233.33$. Absolute zero is $T_{abs} = 0$, so $T_N = -233.33^\circ\text{N}$. Therefore, correct answer is C.