Joseph+Black

Yuri Babak ** Joseph Black ** Joseph Black was a great chemist in many different ways. He discovered a few things one of the most important things was he experimented carbon dioxide. He found out that limestone could be heated or treated with acids to yield a gas he called “fixed air”. While the experiments he observed that the fixed air was denser than air and did not support either flame or animal life. Black also found out that when something is bubbled through an aqueous solution of lime, it would precipitate calcium carbonate. He used this to illustrate that carbon dioxide is reproduced by animal respiration and microbial fermentation. In 1761 Black introduced that the application of heat to ice at its melting point does not change the temperature in of the ice/water mixture. But instead it increases the amount of water in the mixture. He also observed when you add heat to boiling water it does not change the temperature in the water/steam. But what the extra heat does is increase the amount of steam it produces. From these experiments he discovered that the heat applied must have combined with the ice particles and boiling water and become latent. The theory of latent heat marks the beginning of thermodynamics. This all proved important not only in science but when the development of the steam engine was going on. All these things are important things to chemistry. This made Joseph Black the best chemist out there and did the most amazing things.



http://en.wikipedia.org/wiki/Joseph_Black

http://www.britannica.com/EBchecked/topic/67460/Joseph-Black