Which of the following gas will have the highest value for translational K.E. per g, at the same tem — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

translational k.e. per mole = 1.5 rt. translational k.e. per gram = 1.5 rt / m. since temperature is constant, k.e. per gram is inversely ∝ molar mass m. among methane (m=16), helium (m=4), and nitrogen (m=28), helium has the lowest molar mass and thus the highest k.e. per gram.