The salt in this experiment forces its way into the ice cube, therefore bonding with small particles of the ice molecules to raise the freezing point. Since the salt has a higher concentration then the ice causing the ice to dry and become hard to melt. The sugar intrudes the
-EARTHS REFLECTIVITY- If Earths albedo was much greater than it is now we would experience runaway freezing. If it were less than it is we would experience a runaway greenhouse
If water was used as the solvent, it has a freezing point of 0 °C and the solution will freeze at even a lower temperature so you have to put it somewhere cool like a freezer. The freezing point depression concept can be used economically to make lots of money from applications such as antifreeze. Antifreeze is a liquid mixture composed of ethylene glycol and water and it’s vital for a car’s engine because it explains why car fuel doesn’t freeze in the winter and how combustion engines operate at freezing temperatures. The technology we depend in our daily lives like cars wouldn’t be able to function in the winter when it is too cold or even in the summer when it is too warm
Title Problem Definitions Hypothesis Background Information Procedure Materials Results Conclusion References and Acknowledgements Reactions with Alka-Seltzer How does the temperature of water effect how fast the chemical reaction of Alka-Seltzer happens? I think the Alka-Seltzer will react faster in very hot water because the molecules are moving around faster. Therefore, they will run into each other faster causing a faster chemical reaction. Molecules: Two or more atoms which have chemically combined to form something Temperature: A measure of warmth or coldness Reaction Rate: The speed of a reaction Reactants: The substance(s) first involved in a chemical reaction Chemical
Lab: I Scream, We All Scream for …Colligative Properties!? Introduction: When a solute is added to water the physical properties of freezing point and boiling point change. Water normally freezes at 0oC and boils at 100oC. As more solute is added, the freezing point drops (“freezing point depression”) and the boiling point increases (“boiling point elevation”). This property is useful in our lives.
Hypothesis I predict that if the concentration of Hydrochloric acid is increased by 20%, the rate of reaction will also increase by 20%. This is because more molecules of Hydrochloric acid will be present, meaning there will be more molecules to react with. For particles to react, they must collide with one another, but for a successful collision, there must be enough energy for them to react. This is known as activation energy. Activation energy is defined as “the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur”.
Thermal runaway reaction occurs when the heat generated by a reaction goes beyond the heat removal caused by the available cooling capacity. Heat is accumulated leading to a gradual rise in the temperature of the reaction mass; this causes an increase to the rate of reaction and increases the speed of rate of heat generation. [1] Why are thermal runaway reactions dangerous on industrial scale? Thermal runaway reactions are always said to be dangerous on an industrial scale since the reactions go faster in an industry where they tend to reach higher temperatures. As you would already know that exothermic reactions tend to release quite a large amount of heat, so when the reaction mixture gets very warm, a very hot exothermic reaction begins.
At lower temperatures magma is viscous and as the temperature rises the material becomes less viscous and flows more easily. The higher the silicon oxygen content, the higher the viscosity. Silicon and oxygen combine and form strands, chains and sheets which also makes flow more difficult. The location of the volcano also plays a big role in how destructive it will be. At divergent plate boundaries you have high mafic temperatures and very thin crust so gases are unable to get trapped.
The red colour shows basalt or whin sill. This rock is a hard igneous rock. An igneous rock is a rock formed by the result of volcanic eruption, basalt is a form of igneous rock caused by lava cooling quickly. The only reason why the waterfall is here is because of this rock. Without this rock the waterfall would not have occurred because there would have only been a less resistant rock type meaning that a waterfall wouldn’t be able to hold itself from erosion.
The slower molecules gain more thermal energy and collide with other molecules in the cooler object. This process continues until heat energy from the warmer object spreads throughout the cooler object. Some substances conduct heat more easily than others. Solids are better conductor than liquids and liquids are better conductor than gases. Metals are very good conductors of heat, while air is very poor conductor of heat.