lab6 - other in order to describe what will happen when the...

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Jeffrey Trask 10/12/07 Section A PHY 110 Lab 6: Latent Heat Purpose: The purpose of this lab is to experimentally find the latent heat of vaporization of liquid nitrogen. Abstract: In order to determine the latent heat of vaporization of liquid nitrogen (the energy needed to change the nitrogen from a liquid to a gas), two substances are needed: one that will change states (the nitrogen), and one that will not (hot water). The two are added together, so they both are subject to the same situation, and therefore the equations that dictate their behavior can be set equal to each other. The equation for nitrogen is Q = mL , and the equation for the water is T mc Q = . When the two are set equal to each
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Unformatted text preview: other in order to describe what will happen when the two substances are mixed, the resulting equation is w w w n n T c m L m = . All of the variables except for the latent heat can be found by experimentally finding the masses of the nitrogen and water and the initial and final temperatures of the water. The results from doing so can be plugged into the combined equation to find the latent heat of vaporization, the average of which was 202236.75 J/kg. Data: See attached sheet. Discussion: The average value was very close to the accepted value of 199200 J/kg, in fact only 1.52% off, so our results were very good....
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This document was uploaded on 04/06/2008.

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