Which of the following is true about gas molecules,according
Which of the following is true about gas molecules,according to the kinetic molecular theory of gases?
a.) If the absolute temperature is increased,the average kinetic energy of the molecules increases.
b.) As the temperature of a sample increases,the number of gas molecules increases.
c.) The outer electrons of gas molecules are usually in contact.
d.) Gas molecules travel in curved paths in spherical containers.
e.) At the same temperature,nitrogen molecules move faster than helium atoms.
a.) If the absolute temperature is increased,the average kinetic energy of the molecules increases.
b.) As the temperature of a sample increases,the number of gas molecules increases.
c.) The outer electrons of gas molecules are usually in contact.
d.) Gas molecules travel in curved paths in spherical containers.
e.) At the same temperature,nitrogen molecules move faster than helium atoms.
赞 tian_wen1984 幼苗
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a 错 气体平均动能跟气体温度成正比,这里绝对温度升高sample的温度未必升高
b 错 样本的温度升高不会增加气体分子数,这个是不变的
c 对
d 对
e 错 温度相等意味着气体内能,也就是分子的动能相等,动能是1/2mv^2,氮原子质量大于氦原子,两个动能相等,说明氮的速度小
b 错 样本的温度升高不会增加气体分子数,这个是不变的
c 对
d 对
e 错 温度相等意味着气体内能,也就是分子的动能相等,动能是1/2mv^2,氮原子质量大于氦原子,两个动能相等,说明氮的速度小
1年前
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