6.03 Calorimetry

always exchanges energy with the surroundings. Energy exchange can occur as work or as heat

5. Experiment: Click Reset. Check that the Solute outside is 10 and the Initial cell volume is 40%. To calculate the solvent concentration, divide the number of solvent particles by the total number of particles, and then multiply by 100. (Note: The Gizmo only displays the solute concentrations.)

One of the most important skills to have in the chemistry lab is the understanding of how chemicals will react. Knowing for example, how a chemical will react with a metal, is an excellent way of determining the amount of a particular metal in a deposit. This knowledge was used in this lab to determine the amount of copper in an unknown sample mixture. It is also known that the determination of the percent concentration of a certain solution, will directly effect the percent transmission and absorption of a solution, dependent upon its dilution. By first testing known concentrations of a solution, and plotting this information graphically, a line is formed

Because it is dangerous to burn magnesium, it is not possible to directly record heat change. Our lab team suggests an indirect way of determining the heat of combustion for magnesium. To accomplish this, we need to perform two separate trials. One uses a solid (powder) version of MgO, while the other uses Mg ribbon. With the results from these, we can use Hess’ Law to determine q=∆H. This provides both a safe and successful way of indirectly determining the heat of combustion for magnesium.

It used mass, temperature, length, volume, density, and making a dilute solution. I learned the importance as well as the difficulty of making proper measurements in a lab setting. If one measurement is off, it will throw the entire equation off. This will give either incorrect or inaccurate results.

I notice that angle H is in the opposite of the right angle and therefore angle H has a value of 90 degrees. This will mean that the sum of the angles that are listed as (8m - 18) and (5p + 2) will add up to 90. And since the angle (7m + 3) is opposite to the (5p + 2) angle, they're equal. Therefore (8m - 18) + (7m +3) = 90.

Step 3: Obtain 50.0 mL of 3 M HCl using a graduated cylinder and pour it into your 100 mL beaker. Make observations of the acid. Zero out the mass of a weigh boat and then record the exact mass of the beaker with the solution in it in your data table.

Is it possible to find the specific heat of unknown metals using calorimetry? This experiment was designed to determine the specific heat capacity of two unknown metal sample. By comparing the data with the accepted heat capacities of various metals, the composition of the unknown samples was identified. Two unknown metals were put in boiling water for two minutes to ensure thermal equilibrium. The metal was then transferred into a calorimeter where the temperature was measured. The steps above were repeated for the second unknown metal as well. The cp , specific heat, of the metal was then calculated. Based off of the calculations, the obscure metal number one is zinc. This is on the account that the specific heat of the unknown metal was

Reference List: Blauch, D. N. (2014). Calorimetry. Retrieved November 10, 2015, from chm Davidson: http://www.chm.davidson.edu/vce/calorimetry/heatcapacity.html Calorimeters and Calorimetery. (2015).

The Fresno State Freshman Chemistry Stockroom provided the materials that were used during this experiment. The specific materials and equipment’s used in the experiment were a NaCl solution of 6%, 12%, 18%, and 24%. 1 You will need an unknown brine solution, which will be calculating the density.1 Also, you will need a 10 mL volumetric flasks, thermometers, small breakers, eyedroppers, a 50 mL graduated cylinder, and an unknown metal. 1

For the damping measurement in simple structures such as a beam where the damping of the system is not too high (typically $\eta<0.01$) the free vibration condition in time domain is the most suitable method. In this method, there exist initial displacement in the structure. Releasing the structure from this initial displacement, the magnitude of vibrations of the displacement is recorded as a function of time. An example of measurement can be seen in Figure \ref{fig: measestfig2}.

Measure 75 mL of a liquid/substance into a cup. Place liquid/substance on weighted scale to calculate the density. Record results on a piece of paper. When finished finding the density, pour the liquid/substance into beaker. Repeat steps 1-3 with 4 other

First, get a hot plate and scale, and plugged them in, and turned them on. Then, get a thermometer to measure the temperature of the water. Then, get a 25 ML beaker. After that, measure the beaker on the scale before adding water. Then, fill the beaker up with water and measured it. After, add 6 scoops

4. Prepare a vacuum filtration apparatus using a buchner funnel. Obtain one filter paper for each one of your samples, weigh them and record their mass in your notebook (label them with a pencil to be able to differentiate them later).

Mr. Cervantes underwent a transrectal ultrasound biopsy of the prostate. No cancer was seen. He was found to have BPH. I am not sure what the size of the prostate was at the time of the prostate biopsy. Nonetheless, again the pathology is notable for BPH, chronic prostatitis, adenomatous and stroma stromal hyperplasia. He is now on Flomax 0.4 mg two tablets p.o. daily. He comes in for followup.