Day 2 Lab

Linear Expansion Lab

This Experiment was done in order to calculate the linear heat expansion constant, α.  The Experiment consisted of a rod, rotary device, Temperature probe, and logger pro.  Once obtaining the α we will be able to determine the material of the rod.

In the picture above, there are two graphs: Temperature vs Time and Change in Angle vs Time.  The graphs were utilized to obtain the change in temperature, ΔT and the change in angle of the rotary, ΔΘ.

This picture displays our calculation for α, by using the data obtained from the experiment.

α= 2.95 X 10^-5 °C^-1.

After obtaining the linear expansion constant we determined its uncertainty, 3.904 x 10^5 (1/C) .  We were then able to compare our value the chart in of linear expansion constant in the book and, therefore, deduced that the rod is made up of aluminum material because it has a constant of α= 2.4 X 10^-5 °C^-1.   We are able to state its aluminum because it falls under the uncertainty of our experimental value.

Latent Heat of Vaporization

In this Experiment we heated a cup of water with a known mass in order to obtain the Latent heat of vaporization.  We utilized an immersion to heat up the water and a temperature probe.

The Graph above is a Temperature vs. Time graph.  This graph displayed the temperature rising until till levels out at 100 °C.  Thus, at this point it is in the process of Latent heat of Vaporization.  We then utilized this graph to obtain time it took to reach 100°C.

The picture above is our calculation of Latent heat of Vaporization. We utilized time to calculate the heat from the heat rate of the immersion.  We then measured the change in mass from the water lost to vapor. We then obtained that L_v= 2409140 J

Using the Values obtained from the group we obtained a standard deviation of the average value.  Thus, we were able to obtain an uncertainty of ±836164.998 J/Kg.  As a result, we are able to declare that our value for latent heat of vaporization falls within the uncertainty of the actual value of latent heat of vaporization from the book, 2256 * 10 ^3 J/Kg.

Determining the Ideal Gas Laws:

Boyels Law

In this Experiment, we wanted to find the physical meaning behind the relationship of Pressure Vs. Volume.  We utilized a syringe to and pressure sensor to mark the change in pressure as volume decreased.

The Graph of Pressure Vs. Volume Describes that they are inversely proportional to each other.

The Picture above shows why the graph equation P=A/V is measured in (J/cc).  A is the amount of energy within the container at a constant temperature and quantity inside.  So, one may state that the as the volume at a low volume there is a high pressure indicating a high energy while large volume displays a low pressure which will indicate a small amount of energy inside.

P vs. T Charles law II

In this experiment we wanted to find the concept of Charles gas Law.  The items utilized were a flask with a constant volume and pressure of air in order to see the different reactions it had when temperature change occurred from cold temperature, room temperature and warm temperature.   We would analyze the change through logger pro and temperature and pressure probes.

 

The graph above displays a linear relationship between pressure and temperature.  It shows that as temperature rises, the pressure proportionally rises as well.

The picture above shows that since the volume and quantity are constant we may treat it this product as a constant value; thus, the final equation above shows that pressure is proportional to the change in temperature.