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Heat of Vaporization Questions We did a lab where we placed a graduated cylinder upside down...

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Chemistry

Heat of Vaporization Questions

We did a lab where we placed a graduated cylinder upside down ina beaker to observe the air bubble and how it was affected bytemperature. There are a few questions I need help with:

1. You have assumed the vapor pressure of water below 5 degreesCelsius to be negligible. How would the inclusion of its actualvapor pressure affect your results?

2. Assume the graph of ln(P) versus 1/T results in a curved lineinstead of a straight line. What does this mean?

3. Other liquds may be examined by this experimental method todetermine the heat of vaporization. What properties should theseliquids exhibit?

4. Assume you make a mistake and plot ln(P) against 1/T andexpress T in degrees C instead of K. How does this affect yourresults?

           Therewould be no change right?

     

Answer & Explanation Solved by verified expert
4.3 Ratings (773 Votes)
1 We assume that the vapor pressure of water is negligible sothe total volume of gas in the cylinder is due to the air alone Weuse the ideal gas equation to calculate the number of moles of airso that the number of moles of air can be added to othercalculations at higher temperatures The equation is thisif you say that the vapor pressure of water is not    See Answer
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