* Repeat with the rest of the samples. PHASE CHANGE: * In the green ice bucket, scoop a beaker of ice. * Start stirring the beaker of ice * Start recording the temperature of the ice with a thermometer * Weigh the mass of the beaker and record the mass of the ice * Carry the beaker over to the calorimeter with a cup of ice and release it into the cup of 65mL of water already set up for you * Observe the temperature of the ice/water mixture * After the ice has melted all the way, heat up the water and observe the temperature and phase changes as it turns into steam * Record the temperature at which boiling begins * Look at your barometer and record this pressure Data Table: SPECIFIC HEAT OF METALS | Aluminum | Steel | Copper | Lead | Mass of metal (g) | 7.3547 | 20.0685 | 24.06 | 33.1229 | Volume of water (mL) | 100 | 100
Place about 200 mL of tap water in a 400 mL beaker and place it on the hot plate. Heat the water until it boils. 2. Select a metal cylinder to use for this experiment and mass it. Record the mass in the data table.
Is There a Change in Temperature when an Alkali Neutralizes an Acid? Aim The aim of the experiment was to find out if there was a change in temperature when we added an alkali (Sodium Hydroxide) to an acid (Hydrochloric Acid) to neutralize it. Hypothesis We hypothesized that there was going be a raise in temperature as we add 1ml of Sodium Hydroxide at a time to the Hydrochloric Acid due to the neutralization of the acid. The neutralization is chemical reaction that causes an exothermic reaction. Sodium Hydroxide + Hydrochloric Acid Sodium Chloride + Water NaOH(aq) + HClaq → NaCl(aq) + H2O(l) Variables Independent The independent variable of the experiment was the amount of sodium hydroxide that we added to the acid.
We measured out 100 mL of water and transfered it to a styrofoam cup from our graduated cylender. Using the Vernier temperature probe connected to our laptop, we observed the temperature of the metal sample in the boiling water. We transferred the metal sample to the syrofoam cup and observed the temperature of the water with the hot metal sample in it. ::|Mass|Initial Temperature|Final Temperature (Water and Metal)| Water|100.0g|23.0ºC|27.0ºC| Metal|82.6g|89.0ºC|| We used the specific heat formula to find the specific heat of our sample. The formula is: Q=cpmΔT we used a simple formula to find the heat energy that was gained by the water.
Next, cold water from the tap was collected in a plastic cup and measured in degrees Celsius. A handful of ice was then placed into the cup and sat for about 1 minute. The ice water was then stirred with the thermometer and the temperature was again collected in Celsius. Then the ice water sat for about 5 minutes and was stirred once again to collect the final temperature in Celsius. Once all of the temperatures were collected in degrees Celsius they were converted into degrees Fahrenheit and Kelvin.
b. For ice water, add 7 ice cubes and fill the pyrex measuring cup to 8 oz of water. Let it sit for a minute. c. For very hot water, fill the pyrex measuring cup with hot water and put it in the microwave for 1 minute. 2.
Chemistry 3/19/13 Calorimetry Lab Report Purpose: Calorimetry is the measurement of the heat flow into or out of a system for chemical and physical purposes. The purpose of this lab was to use calorimetry to find how much heat is absorbed or released when NaCl is dissolved in water. In this case, we will find the heat coming out of the system, in a chemical process. Hypothesis: Once the sodium chloride is put into the water, the temperature of the water will rise. Procedure: 1.
Then place the beaker below the runoff. It only takes one filling of ice to do this experiment. A physical property that would help determine is separating the method to use for homogenous and heterogeneous mixtures is the size in the boiling points, and the color. 4. Then place the water in the 25ml beaker for the heating bath and lower the set-up so that when the 25ml round bottom flask is immersed the beaker is about 2/3 full.
Apparatus: • Safety glasses • Bunsen burner • Heat proof mat • Sodium thiosulphate • Hydrochloric acid • 100 ml of conical flask • Stop watch • 50 ml measuring cylinder • 10 ml measuring cylinder • Distilled water • Ice • Apron • Beaker Method 1. Collect safety equipment (apron and safety glasses) 2. Collect all materials and apparatuses 3. Set up the practical for room temperature test. 4.
In this report I will be looking at the effect of temperature in the solubility of sugar (sucrose) in water when it dissolve in different temperature of water and how long it takes to dissolve. I will also use different scientific explanations to support my findings. In order to do this this experiment I have used three different variables which are:- * Independent (temperature) * Dependant( time taken to dissolve) * Control ( volume of solvent and volume of solute) Equipment needed for the experiment is * 100 ml beaker * Sucrose (sugar) * Timer * Tea spoon * Kettle with boiling water * Thermometer * Ice cubes The methods of this experiment are as follows * First I will boil the water at 100 degree and then put the required amount of boiled water in the beaker. * Use thermometer to measure the temperature and record and then add the required amount of solute and start the timer and stirring until it completely dissolves. * Document the time it takes .I will repeat the process three times and take the average amount of time it took for the solute to dissolve in the solvent of high temperature.