5Mar2013

The Fire Syringe-Fahrenheit 451

The purpose of this experiment was used to calculate the final temperature after the fire syringe was depressed rapidly. The fire syringe is insulated so that there is no heat transfer when the reaction occurs there for Q=0. By taking the length measurement of the air column before the depression and after and the inner radius of the tube we were able to calculate the initial and final volume. We measured the temperature of the room and used the formula above to calculate the final volume which is 1641.44 K(the K for kelvins got cut off in the picture). The we converted it to fahrenheit 2494.2 degrees Fahrenheit. 

We expected to see a burst of flames when rapidly depressing the plunger here is the video which fit our prediction.  I was unable to orient the video properly for the next experiment I will properly orient the video. 

State Variable and Ideal Gas Law

This picture represents the calculations for the 6 questions in this lab. 

Question 1 is a graph of linear relationship of volume verses temperature for a isobaric process in which pressure is held constant. 

Question 2 is a graph of the linear relationship of pressure verses temperature for a isochoric process in which volume is held constant. 

Question 3 is a graph of the non-linear relationship of pressure verses volume  when temperature is held constant which is a isothermal process. 

Questions 4,5, and 6 are reviewed below with the activity image but the calculations for these pictures can be seen in the picture above. 

Question 4 is a calculation for the volume of the container when the temperature is reduced to 301.8 K in a isobaric process. V(final)=25.09 dm^3

Question 5 is a calculation for the pressure in the container when the temperature is increased to 300K in a isochoric process. P(final)= 124.7kPa

Question 6 is a calculation for the pressure in the container when the volume is decreased to 10 dm^3 in a isothermal process.  P(final)= 124.7kPa