Direct Metricization of Entropy

With skill and enough cautiousness during the compression and expansion processes, an (almost) reversible process can be attained where it is possible to keep the disorder during transfers from increasing noticeably. In this way, disorder is like a kind of substance that can be taken from one body and decanted into another. For instance, the entropy in a piece of chalk could be taken out of it and transferred to an ice cube. In the process, the chalk would cool down and the ice cube would begin to melt. 

In summary, we have determined that the entropy content 5 of a body can basically increase in two ways through the entropy generated inside it 5g(enerated) (cp. Sect 3.4) and, as described in this section, by the entropy exchanged with the surroundings 5e(xchanged) (and that conductively by conduction in matter at rest, Sx, or convectively, carried by a flow of matter. Sc)  

Selection of a Unit for Entropy The transferability of entropy opens up a possibility of measuring the amount of it in a body—at least theoretically. Measuring a quantity means determining how much more of it there is than its unit. Any amount 

Experiment 3.5 Measuring the entropy emitted during a reaction For example, the entropy emitted by the chemical reaction of iron and sulfur into iron sulfide can be measured by a simple ice calorimeter. A mixture of iron powder and sulfur powder is put into a lest tube, and the test tube is subsequently placed in the calorimeter vessel filled with crushed ice. The reaction is initiated by a preheated glass rod or a sparkler. The melt water is collected in a graduated cylinder whereby 0.82 ml of melt water corresponds to the unit of entropy. 

Another way of determining the volume of the produced amount of water is to pour it into a graduated cylinder (Experiment 3.5). 

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