Flask with greater total translational kinetic energy — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

Total translational K.E. = 1.5 nRT = 1.5 (m/M) R T. Since mass m is constant, total K.E. is ∝ T/M. For A ($H_2$): 300 / 2 = 150. For B ($CH_4$): 600 / 16 = 37.5. For C ($O_2$): 900 / 32 = 28.125. Thus, Flask A has the highest total translational K.E.