The table here shows the vapor pressure of water at different temperatures. Use this table to answer the following questions. mmHg 20.0 37.0 Part A You are in a mountain range with atmospheric air pressure of 520 mmHg, and you wish to boil some eggs. What is the approximate boiling point of the water at this air pressure? Express your answer as an integer and include the appropriate units. Hints Value Units Submit My Answers Give Up Part B What will happen if you put some 20 °C water in a vacuum chamber and reduce the pressure to Hints The water will diappear instanty. less than 18 mmHg? The wateril boi The water will catch on fire Submit My Answers Give Up Part C A sealed glass jar has a small amount of water on the bottom. The rest of the volume in the jar is taken up by helium gas at a partial pressure of 526 mmHg, and water vapor. If the total pressure inside the jar is 760. mmHg, what is the temperature of the water? Express your answer to three significant figures and include the appropriate units. Hints T-Value Units Submit My Answers Give Up
Hydrogen peroxide (H2O2) decomposes in the presence of a catalyst to form water and oxygen. The catalyst was added to 5.80 mL of a hydrogen peroxide solution at 20.0 âC, and 50.0 mL of gas was collected over water at a total pressure of 764.0 mmHg. Look up the vapor pressure of water under these conditions in the table.
Vapor pressure of water versus temperature
Temperature (âC)
Pressure (mmHg)
Temperature (âC)
Pressure (mmHg)
0
4.58
55
118.2
5
6.54
60
149.6
10
9.21
65
187.5
15
12.79
70
233.7
20
17.55
75
289.1
25
23.78
80
355.1
30
31.86
85
433.6
35
42.23
90
525.8
40
55.40
95
633.9
45
71.97
100
760.0
50
92.60
Part A
Write and balance the chemical reaction. (Note: catalysts do not appear in balanced chemical equations)
Express your answer as a chemical equation. Identify all of the phases in your answer.
2H2O2(l)â2H2O(l)+O2(g)
Part B
What is the partial pressure of oxygen collected over the water?
Express your answer to one decimal place and include the appropriate units.