EXPERIMENT CHARLES\' LAW PURPOSE To observe and verify the relationship between

Question

EXPERIMENT CHARLES' LAW PURPOSE To observe and verify the relationship between the temperature and volume of a sample of a gas expressed in Charles' Law BACKGROUND One of the most familiar properties of a sample of gas is that at constant pressure the volume of the sample increases as the temperature increases. Likewise, the volume temperature is lowered. According to the Kinetic-Molecular Theory of gases, at a temperature, the molecules in the sample have a greater velocity and therefore the sides of the container with greater force. IF THE CONTAINER IS EXPANDABLE (such as a balloon, a tire, or a cylinder with a movable piston), the volume will increase until the pressure inside the container is the same as the pressure outside. will decrease when the higher will push against Balloon @T1 pressure inside pressure outside After heating, balloon T2 The number of molecules is the same inside the balloon. They are moving faster and push the sides of the balloon out until pressure inside- pressure outside The relationship between temperature and volume, when the pressure stays the same and the number of particles in the sample stays the same, is expressed by CHARLES' LAW If the temperature is expressed in the Kelvin scale (KC+273.15) the relationship is

Explanation / Answer

1. The gas checked for Charles law here is air. If the flask being heated is not dry, the contaminants like water will also vaporize and form a part of the gas mixture thus changing the composition of the gas in study. Such changes in constitution will result in the change in amount of expansion relative to the temperature applied. Thus the results obtained will not conform to that of air alone.

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