Heating Curves

Heating Curves

Adding sugar to water makes the water freeze faster (lower boiling point)
Link: http://www.123rf.com/photo_7903331_a-glass-of-water-with-sugar.html

Yesterday in our chemistry class, we conducted an experiment to observe the boiling and melting points of four different substances: water, water with sugar, saltwater, and water with sugar and salt added. Due to the differences in polarities, these substances caused a significant difference in the boiling and melting points of the substance. It turns out that adding salt to water results in the highest boiling point and melting point, and adding sugar to water results in the lowest boiling point and lowest melting point. Plain freshwater has the second highest boiling point and melting point, and sugar and salt water has the third highest boiling and melting point. We also had to graph our heating curves, and we predicted that as time increases, the temperature of the substance would undergo an exponential growth. At first it did undergo the process of exponential growth; however, when the substance reached its boiling point, the temperature started to stabilize. In actuality, the heat is actually stabilizing the electrons. This is why we add salt to sidewalks to keep the water from turning into snow. If we were to add sugar, it might make the water freeze sooner than the amount of time it takes for that of regular freshwater. As stated our graph compared to other data shows that this substance has the lowest boiling point, meaning that it will make the water freeze faster.  

Credibility of Sources

Dihydrogen Monoxide is "Harmful"

Recently, our chemistry teacher has talked about determining which types of sources are reliable. In order to master this concept, he made us read this article claiming that there is a chemical, known as "dihydrogen monoxide", that can be very dangerous. According to this article, contact with this chemical can cause genetic mutations, affect protein cells, and damaging neurotransmitters, which is the main component of signals that are used in our nervous system. Due to this claim, this website recognizes dihydrogen monoxide as a carcinogenic substance, meaning that this chemical causes cancer. It is also claimed that one drop that we consume of this chemical could lead to immediate death. This substance or chemical can also cause tissue damage, soil erosion, and it was claim to be present in cancerous tumors as well. Also, this chemical was claimed to be used in nuclear power plants. It was claimed to be used as a bio terrorist weapon during World War II, and the article claims that it has been used by other terrorist organizations, including the al-Qaeda. This article tells us to watch for symptoms if we consume too much of this chemical. Symptoms include: excessive urination and sweating, vomiting, nausea, bloated feeling. Although this article says that dihydrogen monoxide is harmful; however, this chemical is the same thing as the chemical for water. In my point of view, this article is totally unreliable and built on lies. The reason as to why this is not factual is because of the fact that we consume a large amount of water everyday, yet we do not experience any of these symptoms stated in this article. We use water in our everyday lives, but we do not experience the detrimental health effects that are predicted by this article. Overall, this article is not a credible source. 

Dihydrogen monoxide, or water, is claimed by an unreliable article to be a "harmful" substance.
Link: http://www.clintonhealth.org/boilwaterorders.html