* Solid- * A form of matter that is of definite shape and volume. * Liquid- * A form of matter that is variable in shape but definite in volume. * Celsius (oC)- * A scale of measurement for temperature that registers the freezing point of water at 0o and the boiling point of water at 100o. * Background- * The basic point of this lab was to find at what temperature would the Lauric Acid melt. Now to find this we would also have to look at the heating curve of the experiment.
Name: 6.03: Calorimetry Data and Observations: Part I: Insert a complete data table, including appropriate significant figures and units, in the space below. Also include any observations that you made over the course of part I. (4 points) I observed that when the metal is placed inside the calorimeter, it transfers heat to the water making the water increase temperature while the metal will decrease temperature. I also noticed that the system was the metal and the surroundings is the water, this is because the water is taking in the heat from the metal making the water warm. Metal Name Mass of Metal Volume of water Initial temp.
This experiment implemented the use of calorimeters, or devices to measure the equilibrium temperature of water and the metal. The metal was heated in a pan on a hot plate, and then placed inside of a calorimeter. Heat was transferred from the metal to the water , and the
So, qwater = qmetal Using the formula qmetal = m × c × ΔT, calculate the specific heat of the metal. Use the data from your experiment for the metal in your calculation. Part II: Calculate the energy change (q) of the surroundings (water) using the enthalpy equation qwater = m × c × ΔT. We can assume that the specific heat capacity of water is 4.18 J / (g × °C) and the density of water is 1.00 g/mL. Show ALL your work.
In our lab we use a more sophisticated one which included a lid on the cup with an inserted thermometer and a stirrer. Thermochemistry is the study of the heat released or absorbed as a result of chemical reactions. The measurement of the total energy of a thermodynamic reaction is called enthalpy (q). This is the basis for Hess’s law which states that if two reactions are combined to yield a third reaction, the sum of the first two is equal to the third. The energy change is the same whether the process occurs in one step or many.
Record the initial temperature of the liquid in the calorimeter. Watch the thermometer until maximum temperature is achieved. Weigh out 2.0g of NaOH pellets. Record the temperature of the distilled water in the calorimeter until the temperature is constant then add all of the pellets at once. Gently stir the pellets until the acid is dissolved by shaking the the apparatus.
the purpose of this is to properly identify the metal given to us. In this experiment we added heat to a container of water. meanwhile we took the mass of our metal sample. We then placed the metal sample into a glass test tube and placed the test tube into the boiling water. We measured out 100 mL of water and transfered it to a styrofoam cup from our graduated cylender.
Also, we watched as the water boiled and made observations as the temperature as it started to boil. This is done on a Virtual Lab. Materials: (Virtual Lab) * Water * Ice * Water-heating device or heater * Metals(Aluminum, Steel, Copper, Lead) * Electrical Balance Procedures: SPECIFIC HEAT OF METALS: * Weigh the mass of the metal samples * Fill up the calorimeter to 100mL. It should be at 25C * Heat up the Aluminum Sample to 200C * Drop the Aluminum Sample in the water and record the temperature changes. * Repeat with the rest of the samples.
The purpose of this experiment is to clarify these important distinctions. The physical properties of a substance are those properties that can be observed and measured without changing the composition of the substance. Physical properties include odor, color, density, solubility, boiling point, and melting point. Because they depend on there being no change in composition, physical properties can be used to describe and identify substances. A colorless, odorless liquid that freezes at 0°C is probably water, for example.
Dalton’s law of partial pressures states that the total pressure of a mixture of gases is the sum of their partial pressures. 2. How does NO(g) act as a catalyst in the production of ozone at ground level? Show the relevant reactions. NO(g) + ½ O2(g) → NO2(g) NO2(g) + hν → NO(g) + O(g) O(g) + O2(g) → O3(g) Since NO(g) is destroyed in the first step but regenerated in the second step, it is acting as a catalyst.