通式法是指当面对的一系列问题的性质相似或类同时,可以利用共同的已知量表示出未知量,列出通式,从而根据数理关系得到问题的答案.这样不但减少了运算量,而且节省了解题时间,提高了解题效率.物理中的一些常见的比较类问题,倘若采用通式法去解将会大大简化解题过程,起到事半功倍的效果.下面利用通式法求解液注变化类热学问题.液注变化类热学问题一般先用假设法,例如假设体积不变,液面变化相同高度等,再根据理想气体状态方程判断压强 The general method is that when a series of problems are of similar or similar nature, we can use the common known amount to represent the unknowns and formulate the general formula so as to get the answer of the question according to the mathematical relationship, which not only reduces the computation But also save time to solve the problem and improve the efficiency of problem solving some common physical comparison problems, if the general method to solve the problem will be greatly simplified to solve the problem, play a multiplier effect with the following general formula Method to solve the problem of thermodynamic changes of liquid injection.Physical change of liquid thermodynamic problems generally use hypothetical method, such as the assumption that the same volume, the same level of liquid level change, and then determine the ideal gas state equation pressure