A Listing and Equating Method for Solving Chemistry / Physics Problems

概要

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There are two methods for student exercise in chemistry/physics problem solving; one is a quantity-ratio method (QRM) that uses a ratio of physical quantities of the same kind, and the other is a formalization-and-substitution method (FSM) that substitutes data for physical quantities in formalized equations. This note shows an alternative to the two methods, hereafter called a listing-and-equating method (LEM), for solving chemistry/physics problems. The strategy of LEM is based on the fundamental equation: physical quantity = numerical value x unit. In LEM "listing" lists all the data in a given chemical/physical problem; "equating" equates two physical expressions, each of which is made up of physical quantities and/or numerical values. A two-fold meaning, which often leads chemistry/physics beginners into confusion, in formalized equations can be separated by the listing process. In the equating process of LEM no ambiguity with relation to the equality of QRM occurs. Several examples that are solvable by means of LEM are given.
上越教育大学の論文