搜搜做题作业网为什么He-3的熔化焓为负值?（为什么He-3熔化时放热?）
来源：学生作业帮 编辑：搜搜做题作业网作业帮 分类：英语作业 时间：2024/07/15 21:53:21
为什么He-3的熔化焓为负值?（为什么He-3熔化时放热?）
Because of the weak,induced dipole-dipole interaction between helium atoms,their macroscopic physical properties are mainly determined by their zero point energy ("ground state kinetic energy").Also,the microscopic properties of helium-3 cause it to have a higher zero point energy than helium-4.This implies that helium-3 can overcome dipole-dipole interaction with less thermal energy than helium-4 can.
Helium-3 boils at 3.19 kelvin compared with helium-4 at 4.23 kelvin,and its critical point is also lower at 3.35 kelvin,compared with helium-4 at 5.2 kelvin.Helium-3 has less than one-half of the density when it is at its boiling point:5.9 gram per liter compared to the 12.5 gram perliter of helium-4 -- at a pressure of one atmosphere.Its latent heat of vaporization is also considerably lower at 0.026 kilo joule per mole compared with the 0.0829 kilo joule per mole of helium-4.
你问的应该是在0.3K以下fusion焓是负值吧 我这里有一份俄亥俄州空军基地的关于He3热力学性质的报告 如果需要我可以提供给你
再问： 麻烦发到shufan_chen@163.com，多谢多谢
再答： 已发 请查收
再问： 抱歉，你发的是什么格式的？我没法打开
再答： 是pdf 解密之后的文件
Helium-3 boils at 3.19 kelvin compared with helium-4 at 4.23 kelvin,and its critical point is also lower at 3.35 kelvin,compared with helium-4 at 5.2 kelvin.Helium-3 has less than one-half of the density when it is at its boiling point:5.9 gram per liter compared to the 12.5 gram perliter of helium-4 -- at a pressure of one atmosphere.Its latent heat of vaporization is also considerably lower at 0.026 kilo joule per mole compared with the 0.0829 kilo joule per mole of helium-4.
你问的应该是在0.3K以下fusion焓是负值吧 我这里有一份俄亥俄州空军基地的关于He3热力学性质的报告 如果需要我可以提供给你
再问： 麻烦发到shufan_chen@163.com，多谢多谢
再答： 已发 请查收
再问： 抱歉，你发的是什么格式的？我没法打开
再答： 是pdf 解密之后的文件