The ideal gas law, R, can be experimentally determined. Use the data provided below from the reaction of potassium chlorate decomposing to form oxygen gas and potassium chloride to experimentally determine the value of R in units of L•atm/mol•K. 2KClO3 (s) → 2KCl (s) + 3O2 (g) The evolved oxygen is collected over water. The relevant data from the experiment is summarized below. Mass of KClO3 used 0.0665 g Initial volume reading 46.0 mL Final volume reading 64.2 mL Temperature 22.0°C Total pressure 772.0 mm Hg   A table of vapor pressures of water is also available: Temperature (°C) Vapor Pressure of Water (mm Hg) 21 18.7 22 19.8 23 21.1 24 22.4 25 23.8 How many moles of KClO3 were used in this experiment? How many moles of O2 gas were evolved in this experiment?   What is the experimentally determined value of the ideal gas law constant, R, expressed in L•atm/mol•K?

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The ideal gas lawR, can be experimentally determined.

Use the data provided below from the reaction of potassium chlorate decomposing to form oxygen gas and potassium chloride to experimentally determine the value of R in units of L•atm/mol•K.

2KClO3 (s) → 2KCl (s) + 3O2 (g)

The evolved oxygen is collected over water. The relevant data from the experiment is summarized below.

Mass of KClO3 used 0.0665 g
Initial volume reading 46.0 mL
Final volume reading 64.2 mL
Temperature 22.0°C
Total pressure 772.0 mm Hg

 

A table of vapor pressures of water is also available:

Temperature (°C) Vapor Pressure of Water (mm Hg)
21 18.7
22 19.8
23 21.1
24 22.4
25 23.8

How many moles of KClO3 were used in this experiment?

How many moles of O2 gas were evolved in this experiment?

 

What is the experimentally determined value of the ideal gas law constant, R, expressed in L•atm/mol•K?

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