Exploring energy and equilibrium through simple experiments

Energy moves us and entropy determines the direction, e.g. of chemical equilibria. They are behind chemistry, they
accompany us through chemistry lessons and many everyday problems, such as the climate debate. This article aims
to get to the bottom of the energy concepts in chemistry and their application in chemistry teaching by looking at
about a dozen phenomena in ten experiments. The role of entropy is only touched on in passing; dealing with it explicitly would be a topic in itself.