The volume of air is 0.300 mL at 2.0 C, when the barometric pressure in the room
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Question:
The volume of air is 0.300 mL at 2.0 °C, when the barometric pressure in the room is 745.0 torr, then how many moles of air are in the U-tube? R = 6.237 x 104 mL . torr .
mol-1. K-1??
a. 7.43 x 10-8 moles
b. 6.75 x 10-3 moles
c. 4.50 x 10-1 moles
d. 1.30 x 10-5 moles
From your data in Part 1 of the experiment, you calculate the natural log of the partial pressure of water and 1/T value in K for 5 points between 50°C and 80°C. You make a graph of ln(P) vs. 1/T and determine that the slope of the linear line is -4800 K. Use this information to calculate ΔHvap of water. Make sure to use R = 8.314 J .n
n
a.n39.9 kJ/moln
b.n46.6 kJ/moln
c.n31.5 kJ/moln
d.n0.578 kJ/mol
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