One way to describe the universe scientifically is to relate the heat with different processes of matter. Their relations and interactions fall under the field of Thermodynamics. This heat-matter interaction is apparent in the boiling of water or any other liquid. Boiling involves the physical transformation (no change in the composition) of a liquid (water) to a gas (steam) by using the heat added to the system to break the intermolecular forces of attractions that hold the liquid together. The boiling process in many physical systems depends on many factors. For this study, the effect of adding other substances on the boiling process of water was determined. This was done through the comparison of the rate of the boiling process of water …show more content…
943). Theoretically, addition of NaCl to water causes its boiling point to rise. This phenomenon is called the boiling point elevation. Using this pre-existing knowledge, the hypothesis below can be formulated on the basis of boiling point elevation. 1.1 Hypothesis
The addition of NaCl to water slows down the boiling rate of water.
1.2 Objectives
The aims of the study are:
1. To determine the effect of adding NaCl to the rate of boiling process of water;
2. To relate the heat capacity of water to the boiling process; and
3. To generalize on the relationship of solubility and thermodynamics.
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Then the tap water was boiled using the stove. The time (in seconds) when the tap water boiled was recorded. The procedure was repeated for two (2) more times. The average of the three (3) boiling rates was also recorded.
Next, for the first experimental setup, five (5) cups of tap water was poured in the casserole. Then, one (1) tablespoon of rock salt was dissolved in the tap water. The solution was boiled using the stove. The time (in seconds) when the solution boiled was recorded. Again, the procedure of boiling the tap water with one (1) tablespoon of rock salt was repeated for two (2) more times. The average of the three (3) boiling rates was also recorded.
Then, for the second experimental setup, five (5) cups of tap water was poured in the casserole. Then, two (2) tablespoons of rock salt was dissolved in the tap water. The solution was boiled using the stove. The time (in seconds) when the solution boiled was recorded. Again, the procedure of boiling the tap water with two (2) tablespoons rock salt was repeated for two (2) more times. The average of the three (3) boiling rates was also
Hypothesis: The Alka Seltzer will dissolve fastest in hot water and slowest in cold water.
Two equations were used in this experiment to determine the initial temperature of the hot water. The first equation
It was learned that changing the volume of the same substance will never change the boiling point of the substance. However having two different substances with the same volume will result in two different boiling points. The purpose of this lab was to determine if changing the volume of a substance will change the boiling point. This is useful to know in real life because if someone wanted to boil water to make pasta and did not know how much water to
Afterwards, we conducted crystallization to evaporate the liquid in an attempt to detect the presence of a salt. Before stating which of the potential
The sources stated that water boils at 100°C, so this is what I was expecting when I started to boil the rest of my distilled water. After the water reached a steady boil, my thermometer first reached 102°C. This was a bit off, but I took my thermometer back out and let it reach room temperature again before doing the second trial. The second time my thermometer reached 100°C, which was exactly the right temperature. After repeating the experiment for the last time, I recorded 101°C. This averaged out to be 101°C.
To investigate the relationship between three different alkanols in terms of their carbon chain length, rate of increased temperature, and heat of combustion, in order to determine which is the most efficient at heating water to a certain temperature whilst reducing time and effects on the environment.
Variables --------- During the experiments, the water will be heated using different spirit burners containing different alcohols. I will be able to change different parts of the experiment. These are the. Volume of water heated:
Solid A was identified to be sodium chloride, solid B was identified to be sucrose, and Solid C was identified to be corn starch. Within the Information Chart – Mystery White Solid Lab there are results that distinguishes itself from the other 4 experimental results within each test. Such as: the high conductivity and high melting point of sodium chloride, and the iodine reaction of corn starch. Solid A is an ionic compound due to its high melting point and high electrical conductivity (7), within the Information Chart – Mystery White Solid Lab there is only one ionic compound which is sodium chloride, with the test results of Solid A, it can be concluded that is a sodium chloride. Solid B was identified as sucrose due to its low electrical
Input variables In this experiment there are two main factors that can affect the rate of the reaction. These key factors can change the rate of the reaction by either increasing it or decreasing it. These were considered and controlled so that they did not disrupt the success of the experiment. Temperature-
In a 100ml beaker 30mls of water was placed the temperature of the water was recorded. 1 teaspoon of Ammonium Nitrate was added to the water and stirred until dissolved. The temperature was then recorded again. This was to see the difference between the initial temperature and the final temperature.
Investigating the Effects of Temperature on the Rate of Reaction between Magnesium and Hydrochloric Acid Introduction Chemical kinetics is the study and examination of chemical reactions regarding re-arrangement of atoms, reaction rates, effect of various variables, and more. Chemical reaction rates, are the rates of change in amounts or concentrations of either products or reactants. Concentration of solutions, surface area, catalysts, temperature and the nature of reactants are all factors that can influence the rate of reaction. Increasing the concentration of a solution allows the rate of reaction to increase because highly concentrated solutions have more molecules and as a result the molecules collide faster. Surface area also affects reaction rate because when the surface area of a reactant is increased, more particles are exposed to the other reactant.
Methodology: A plastic cup was filled half way with crushed ice and mixed with four spoonfuls of 5 mL of sodium chloride. A thermometer was quickly placed inside the cup to take the temperature and the
its state (Solid, liquid, gas); thus water has a higher melting point and a higher boiling
The Effect of Salt Solution Concentration On The Mass Of Potatoes Introduction = == == == ==
In this experiment the Sodium Hydroxide solution went through three different phases where its quality and quantity changed. The first phase was called I. Preparing Approximately 0.1M NaOH, 1000mL of clear distilled water was boiled and then chilled to room temp.