When looking at the volume of gas compared to the temperature that it is measured in, discuss two sources of error and one way to change the experiment to get closer to the theoretical value. ("Human error" is not an acceptable source of error.)

We are asked for two sources of error when investigating Charles' law, which links the volume of gas and the absolute temperature at which it is housed. We can divide errors into systematic errors, which pertain to experimental procedures and apparatus used, and random errors, which have to do with the uncontrollable factors that influence every single measurement.

One source of error is the fact that, when the volume of gas has been heated in a water bath, the thermometer is placed in this water bath and not directly in the gas container. Hence, we need to assume that the temperature of the water bath is equal to that of the gas. This may not be the case, and may introduce an error.

Another source of error is the fact that the gas may leak out of its container if it is not properly sealed. This will cause the amount of gas in the experiment to change with time, influencing the readings and causing aberrations between the experiment and theoretical values.

One way to change the experiment is to address the first source of error, stated above. The water can be continuously stirred and the experimenter can wait a few minutes to ensure that the gas is at a steady-state temperature, prior to noting down the data.