This report discusses an experiment to investigate the relationship that exists between temperature and volume of air in a sealed syringe that is either heated or cooledwith water in di?erent temperature.
Charles Law,where V is the volume, T is temperature, and k is constant of proportionally, states thatthe volume of a given amount of gas held at constant pressure is directly proportionalto the Kelvin temperature. For comparing the same substance under two di?erent setsof conditions, the law can be written as,and it shows that as the temperature goes up, the volume also goes up, and vice versa.In this experiment, collecting enough data (at least 5 data points with 3 trials each)is expected to properly study the relationship between gas temprature and gas volumein constant pressure. According to the gas law, the volume of air in the sealed syringeshould increase as the temperature increases; the volume and the temperature shouldhave a linear, proportional relationship.The methods for this experiment are as follows:1. Place the sealed syringe in an ice water bath2. Leave the syringe in for 2 minutes3. Record the temperature of the ice water bath4.
Record the volume of air in the syringe5. Place the syringe into a warm water bath (30°C)6. Leave the syringe in for 2 minutes7. Record the temperature of the warm water bath8.
Record the volume of air in the syringe9. Place the syringe into a warm water bath (50°C)10. Leave the syringe in for 2 minutes11. Record the temperature of the warm water bath12. Record the volume of air in the syringe13. Place the syringe into a warm water bath (70°C)14. Leave the syringe in for 2 minutes15. Record the temperature of the warm water bath16.
Record the volume of air in the syringe17. Place the sealed syringe in a room temperature water bath18. Record the temperature of the room temperature water bath19.
Record the volume of air in the syringeWhen the sealed syringe was placed into the ice water bath, the air inside the syringegot shrunken. On the other hand, when the syringe was placed into the warm waterbaths (21°C, 30°C, 50°C and 70°C), the air inside the syringe got expanded as thetemperature of water increased. It took about 1 minite to change the volume of the airsince it required time to warm up or cool down the air inside the syringe.Since the graph of this experiment shows almost a straight line and the volumeincreases as the temperature goes up, the temperature and volume have a linear relationship that Charles Law states.
However, the x-intercept of the line is around -100°C,which is supposed to be around -273°C, which means the experiment has a huge error.The percentage error of the result of this experiment is around 277 %, so there mustbe some factors that caused errors.There is a large percent error (277 %) considering the wide range of sources oferror in this experiment. Some sources of error which could have been occurred in thisexperiment are human errors such as measuring incorrectly, limitation of equipment,di?erences of temperature, and sampling. In this experiment, a sealed syringe wasused to ?nd the volume of the air. The smallest division of the scale was 0.
2 mL;thus, the absolute error of the syringe is 0.1 mL, which could have been fairly a largedi?erence. Using a syringe which has smaller scale could improve this experiment sinceit reduces the absolute uncertainty. Also, the data might have been a?ected by thethermometer used to record the temperature. When the thermometer was dipped intothe water baths, the temperature of water could have been slightly cooled. To not dipa thermometer repeatedly could reduce the error; however, it is required in this lab.Another source of error is that the lab got done after two (2) days since it was stared,so there are some di?erences could have been occurred, such as the air, temperatureof water and the classroom.
To be done in shorter amount of time could improve thelab. Moreover, there is a possibility that plunger of the syringe has released the airinside. Sampling is another source of error since only 4 trials were performed in thisexperiment.
As the data table shows, the data corrected in the experiment is not equal.For instance, the 3rd and 4th trial of 30 °C warm water bath have 0.6 mL di?erence.That must have a?ected the result since the median of four trials were used to plot thegraph. To study larger sample size could improve and reduce the sampling error andmake the data more reliable.The purpose of this lab was to investigate a relationship that exists between thevolume of gas and temperature in a sealed syringe. The air inside the syringe was eitherheated up or cooled down and its volume was recorded in each trial. My hypothesis was that according to Charles Law, V T = k , the temperature and the volume have a proportional relationship.
The result of this experiment is that the volume of the airinside the sealed syringe changed as the temperature changed. When it was warmed up,the air got expanded. On the other hand, as the temperature went down, the volumeof air got decreased and shrunken. The graph of data corrected in this lab shows thevolume and of the air almost have a proportional relationship as Charles Law states.However, there is a huge percentage error (277%) in this experiment, therefore, this labcould not prove that the volume of a given amount of gas is directly proportional toits temperature on the Kelvin scale when the pressure is held constant. To reduce theerror and improve this lab will make it possible to prove Charles Gas Law