Charles Law Lab (1)

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  Charles’ Law LabPrelab  – You will need to complete the following in your lab book - title, purpose, background information, storyboard of the procedures, and develop a data table for the lab . Like in the past, if the pre-lab assignment is not completed you may not be permitted to participate in the lab. INT! #CTI!N  According to the kinetic theory, an increase in temperature will cause the molecules of a gas to move faster and exert more pressure, or cause the gas to expand.onversely, as a gas is cooled, the molecules will move more slowly and the gas will contract, or exert less pressure. !n other words, the volume of a gas increases as temperature increases if the pressure remains constant. his relationship between the volume of a gas and its temperature is known as C$%L&'’ L%( . P!C& #& #.$repare a data table for the experiment that includes the following information%  Atmospheric pressure, temperature of boiling water & # ', emperature of the water in the flask & ( ', )olume of the water in the cooled flask, volume of the water that fills the flask.(.*et up the apparatus as shown in prelab discussion and in +igure #.#. btain a mL beaker and add approximately enough tap water to completely cover the immersed (/ mL flask. btain a dry  (/ mL 0rlenmeyer flask. $lace a one-hole stopper, si)e * or + , fitted with a glass dropper pipet into the flask, and place the flask into the beaker of water as shown in figure #-# &front of this worksheet'. 1eat the water to boiling and measure the temperature using the $asco probe. 2ecord the temperature of the boiling water in your data table. ontinue heating at this temperature for at least 3-/ minutes. Lower the heat if necessary to minimi4e splattering. here will be some splattering so move your books and papers out of the way. 5hat is happening to the gas in the flask during this process63.5hile the flask is heating, prepare the sink by placing a stopper in the drain and filling it with water &up to about # inch from the top of the sink'. 7.$ush your sleeves up so that they do not get wet in step /. 2emove the hot flaskfrom the beaker. $rotect your hand while placing your finger firmly over the end of the glass pipet &this should not be hot, but T$& L%'- IT'&L (ILL .& $!T/ . /.*ubmerge the flask in the sink keeping it perpendicular to the desktop. 8o not allow air to enter the flask while transferring it to the sink by keeping your finger securely over the entire glass pipet. nce the flask is in the water you can remove your finger from the pipet and should remove the clamp, but be careful  because it and the flask may still be $!T . Also be careful not to tilt the flask too much past perpendicular..1old the flask under the water &with the open pipet facing down' until the flask has cooled and the water stops entering. 2aise the flask, while keeping it perpendicular, with the glass tube still facing down, until the water level inside theflask is the same as the water level outside the flask. he pressure inside the flask is now e9ual to atmospheric pressure outside the flask.:.$lace your hand underwater while the two water levels are e9ual and put your finger over the glass tube. arefully remove the flask from the water trapping all of the water inside the flask. $lace the flask in an upright position on your lab table and then remove your finger. 5hat happened to the volume of the gas6 1ow can you tell6;.<sing a wax pencil, make a mark on the flask at the bottom of the rubber stopper.You may now take the stopper out. =easure the temperature of the water in the sink and record the temperature as (. >.$our the water in the flask into a graduated cylinder and record the volume in your data table as the volume of the water in the cooled flask. hink about what this water volume  will allow you to calculate.#.+ill the flask to the line you marked at the bottom of the stopper. =easure the volume of this water in a graduated cylinder and record it as the volume of water that fills the flask. hink about what this volume will tell you. Post lab activities 0  alculations - or each of the following give a word e1uation and show all of your work2 #.onvert both temperatures to ?elvin.(.5hat is the initial volume of the gas6 &hint% there is no calculation needed here' @e sure to explain how you know that this is the volume of the gas.3.alculate the experimental volume of the gas in the flask after it has cooled. 7.<se harles Law to determine the theoretical value  for ) (  using the measurements you took for ) # , # , and ( ./.alculate the B error of your experimental value for ) (  &after correction in calculation 7'.  onclusions – Address specific possible reasons for your errors
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