C.18.7L D.56.1L 14.At what temperature would Co2 gas have the same average molecular speed as02 gas has at400K？（) A.250K B.550K C.400K D.600K 15,How much faster does nitrogen escape from the balloon than oxygen?（) A.1.07 times faster B.1.14 times faster C.0.875 times as fast D.0.935 times as fast 二、判断题（判断下列各项叙述是否正确，对，打“√”；错，打“×”。） 1、与理想气体相比，真实气体的相互作用力偏 小。 (×)C. 18.7 L D. 56.1 L 14、At what temperature would CO2 gas have the same average molecular speed as O2 gas has at 400 K? ( ) A. 250 K B. 550 K C. 400 K D. 600K 15、How much faster does nitrogen escape from the balloon than oxygen? ( ) A. 1.07 times faster B. 1.14 times faster C. 0.875 times as fast D. 0.935 times as fast 二、判断题（判断下列各项叙述是否正确，对，打“√”；错，打“×”。） 1、与理想气体相比，真实气体的相互作用力偏 小。 （ × ）