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1.估算不可接近的物体例1 宇宙中的恒星,其温度约有多高?分析根据恒星发出的光的辐射强度,在可见光区域内按波长的分布情况(即物体的颜色),可以大体来估算其温度.2.估算微观量(1)要建立模型:一般情况下可以把微观粒子的形状看作是球形或者立方体形,且这些粒子之间紧紧挨着.在这种理想模型下,1摩尔任何物质的体积均可看作阿伏加德罗常数个粒子体积的总和.这样,分子的直径或分子之间的距离就可以用分子模型的边长或直径来反映了.
1. Estimating inaccessible objects Example 1 How high is the temperature of a star in the universe? Analysis According to the radiation intensity of the light emitted by a star, the distribution of wavelengths in the visible light region (ie, the color of the object) can be approximated. Estimate the temperature. 2. Estimate the microscopic quantity (1) To establish the model: In general, the shape of microscopic particles can be regarded as a sphere or a cube, and these particles are closely interposed. Under this ideal model, A volume of any substance can be regarded as the sum of the particle volumes of the Avogadro’s constant. Thus, the diameter of a molecule or the distance between molecules can be reflected by the length or diameter of a molecular model.