Statement of Problem: Using a thermometer with graduations above 40ºC covered, construct an experiment to find the temperature of the water found in a coffee pot which simulates a water heater that can be heated to 55ºC. Hypothesis: If the temperature of 50mL of tap water is found and then mixed with 25mL of hot water, then the temperature of the hot water can be determined because by finding the final(mixture of hot/tap water) and initial(tap water) temperatures, the experimenter can discover the original temperature the hot water was before it was mixed with the tap water. Experiment: Procedure: Fill a graduated cylinder with 60mL of tap water Pour the measured 60mL of tap water into one styrofoam cup and let it sit for two minutes …show more content…
After two minutes, determine the temperature of the tap water, this will be the initial temperature in the equation Write out constants for the equation -q(exo)=q(endo) Fill the same graduated cylinder this time with 40mL of tap water Pour the 30mL of tap water into a second styrofoam cup and mark with a pencil the water level in the cup Pour the 30mL of tap water out and fill the same styrofoam cup with hot water using the pencil mark as a guide—be careful not to spill hot water or touch hot surfaces Quickly mix the 30mL of hot water to the 60mL of tap water together in a third styrofoam cup Measure the temperature of the combined hot/tap water mixture, this will be the final temperature in the equation Calculate the equation with the temperatures found with the thermometer Independent Variable: ratio of water samples in mL Dependent Variable: The temperature of the hot water Controlled: using the same hot water (coffee pot), styrofoam cups, and thermometer …show more content…
Using these new measurements will give the same outcome as the 50mL of tap water and 25mL of hot water as stated in the hypothesis. However, we redid our experiment and tested the water ratio with 60mL to 30mL and found the same answer of 65ºC. The data shows both water ratios do in fact give the same result making this procedure accurate and can allow the experimenter to find the right temperature of the hot water. My lab partner and I learned that by finding the initial and final water temperatures within our experiment, we were allowed to use a simple equation which could get us our answer. We figured out how to use the equation -q(exo)=q(endo) more efficiently and were able to understand its function
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For two minutes, the metal was suspended in the boiling water. During the two minutes, a Styrofoam cup was filled with 100 mL of room temperature water. The initial temperature of the metal was equal to the temperature of the boiling water. In order to probably calculate the temperature of the metal, the steps were repeated and another temperature was
AP Chemistry Semester 1 Final Review 2016 Basics of Chemistry: Name the following compounds BO3 H2S NaOH OF8 PCl6 HNO3 HgNO2 Write the formula for each compound Pentaboron triselenide Sulfuric Acid Carbon Monoxide Lithium Chloride How many moles are in 58.6 g of AgNO3 How many grams are in 2.5 moles of Cl2
Introduction: In this assignment, I will be doing two experimentations on examining the impact of temperature on the Alka-Seltzer’s response time. The first experimentation that I will be doing involves some water that is room temperature. The second experimentation that I will be doing involves some water that is very hot. If I want to be able to figure out the impact of the temperature on water, I will have to document the time it will take for the Alka-Seltzer to go into solution.
37.8 °C and 36.3 °C 30-40 °C 3. 41.7 °C and 40.2 ° C 40-50 °C 4. 50 °C and 48 ° C 50-60 °C Average temperatures: (37.8+36.3)/2=37.05 °C (41.7+40.2)/2=40.95 °C (50+48)/2=49 °C Table 1 -The values of experiment Temperature (°C) Density (kg/m3) 26.5 995 37.05 992.5 40.95 991 49 990 70 984.856 80 982.524 90 980.272 100 977.93 Table 2. The values in steam table Temperature (°C) Density (kg/m3)
The topic of research is, “how fast does an Alka-Seltzer tablet make gas?”. In the experiment, the scientists will be measuring the chemical reaction rates that occur, when 1 Alka-Seltzer tablet is placed in a specific temperature of water. The independent variable during the experiment will be the temperature of the water (degrees Celsius). The dependent variable during the experiment will be, the rate in which gas is produced (in seconds). The constants of the experiment, will be the amount of water used and the Alka Selter compound.
Paragraph 1 The objective of the experiment is to test; how will water temperature affect the rate of reaction of an alka-seltzer tablet? The dependent variable of the experiment is the dissolving time. When an alka-seltzer tablet starts to fizz it begins to dissolve, due to the citric acid and sodium bicarbonate the tablet contains (Clark, “Why does Alka-Seltzer fizz?).
Although, regardless of the incorrect data I still could observe how each of the temperatures decreased differently for the period of time for each of the test tubes, because of coincidental having a hypothesis supported by the data. A realistic improvement that can reduce the impact of the issue on the data, is having the three members of the group, each of them in charge of a test tube, so each person will pour the amount of water needed, start the timer when they finish (each member will have a timer), measure and record the temperatures they get from the test tube they are in charge of. The results will be shared between the members
Research question What is the effect of temperature Amylase activity? Word count-1453 Background research Enzymes are biological catalysts that speed up a chemical reactions. They do this by decreasing the activation energy(the energy needed to start the reaction) of a chemical reaction. The enzyme present in our saliva is called Amylase. Amylase increases the rate of reaction by decreasing the activation energy needed to hydrolyse the starch molecules.
Introduction The intent of this experiment is to understand how hot and cold water interact with each other by combining clear hot water and black ice cold water. I hope to learn more about how hot and cold water interact with each other. As of now, I know that cold water is denser than hot water. Knowing this I formed my hypothesis.
Introduction: In this lab, of water in a hydrate, or a substance whose crystalline structure is bound to water molecules by weak bonds, is determined by heating up a small sample of it. By heating, the water of hydration, or bound water, is removed, leaving only what is called an anhydrous compound. Based on the percent water in the hydrate, it can be classified as one of three types: BaCl2O ⋅ 2H20, with a percent water of about 14.57%, CuSO4
Materials 1 calibrated thermometer, 1 scale that reads mass, 2 Styrofoam cups, 1 small lead sinker, boiling water in a beaker, 1 pair of kitchen tongs, 1 small cooking pot, stove top, distilled water, and 1 pair of safety goggles (I did not use a cork stopper). III. Procedure First, the beaker
Research Question: To investigate and compare how different temperature (5℃, 15℃, 25℃, 35℃, 45℃) can affect the concentration of carbon dioxide in soda water through titration with sodium hydroxide solution. Introduction: Carbon dioxide plays an important role in soft drinks. Soda water is manufactured by pumping carbon dioxide into water under high pressure. Carbon dioxide dissolves in water to form carbonic acid, which is the fizz we find in soft drinks. CO2 + H2O ⇌
Exploration Title: Effect of Temperature on rate of Osmosis Submitted By: Abdulkarim Kamal Date Submitted: October 19th 2015 Subject: Biology HL Teacher: Mr. Nick Aim: This is an investigation to determine the relation between temperature of a solution (sucrose) and the rate of osmosis Scientific Context: Osmosis is defined a passive transport process in which a fluid diffuses across a semi-permeable membrane, from an area of high solute concentration to an area of low solute concentration and vice-versa. There are various factors that could potentially influence the rate of osmosis; these factors include volume, concentration, and temperature. If all external factors that may interfere with rate of osmosis are controlled, the results will show equal amounts of fluid on both sides of the barrier (membrane); this is known as an “isotonic” state.