实践是检验真理的惟一标准。在密闭的容器中进行化学实验,理论上应遵循质量守恒定理。但是,若生成物有气体的话,那么它在实践中是否仍然遵循质量守恒定理呢?如果实验结果与理论不符,那么其原因又是什么呢?一、提出问题在原国家教委1986年科研项目《中学化学实验指南》编写组编写的《中学化学实验指南》上册第130页有这样 Practice is the sole criterion for testing truth. Chemical experiments in closed containers should theoretically follow the principles of conservation of quality. However, if the product has gas, does it still follow the principle of conservation of quality in practice? If the experimental results are inconsistent with the theory, then what is the reason? First, raise the question in the original State Education Commission’s 1986 research project The Chemistry Experiment Guide prepared by the compiling group of the “Guidebook for Chemical Experiments in Middle Schools,” Vol. 130, page