Sackur, Otto

Clara Haber reportedly pleaded with Haber to stop his poison gas work. She visited the training site for poison gas workers and was horrified by experiments conducted on animals. Early in the war, an experiment in the institute laboratory exploded moments after Haber left the room. One scientist lost his hand, and a young physicist, Otto Sackur, one of Clara s classmates at Breslau University, was killed. As Sackur lay dying, Haber stood speechless, unable to do anything but shake his head in shock. It was Clara who thought to try first aid and who ordered her friend s necktie cut away so he could breathe more easily. Haber later found a job at the institute for Sackur s daughter. 

On December 17, Fritz Haber stood nearby as two of his oldest friends at the institute, Gerhard Just and Otto Sackur, prepared to mix two such chemicals in a test tube. Then someone called from next door. He was needed in the mechanic s shop. Moments after Haber left the room, the test tube erupted in a violent explosion and the laboratory was splattered with blood. The blast blew off Just s hand, but he would survive. Sackur, who d been looking directly at the mixture, lay dying, horribly mutilated. 

The Sackur-Tetrode equation was derived independently by Otto Sackur (1880-1914), a German physical chemist, and Hugo Martin Tetrode (1895-1931), a Dutch physicist, in 1912. While it is possible to calculate the absolute entropy of molecules including polyatomic gases with their multiple vibrations, we will only give a brief illustration for diatomic CO gas that uses the energy formulas we have previously derived. Consider = G gas at 298.15°K. First we consider the translational entropy as... 

In the first months of the war, the Institute searched for ways to economize or provide substitutes for so-called war materials - substances required for the operation of firearms, artillery and other war machines examples include toluene, glycerin and saltpeter. Gerhard Just made rapid progress in this field, in collaboration with Otto Sackur. Together they were able to demonstrate, through careful... 

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