Boiling point of water in a closed container

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SUMMARY

The boiling point of water in a closed container is determined by absolute pressure, not gauge pressure. In the discussed scenario, with a gauge pressure of 101 kPa, the absolute pressure reaches 202 kPa. This increased absolute pressure raises the boiling point of water above 100°C, confirming that boiling point is directly related to absolute pressure levels.

PREREQUISITES
  • Understanding of gauge pressure and absolute pressure concepts
  • Basic knowledge of thermodynamics and phase changes
  • Familiarity with boiling point elevation principles
  • Knowledge of pressure measurement units (kPa, atm)
NEXT STEPS
  • Research the relationship between pressure and boiling point using the Clausius-Clapeyron equation
  • Explore the effects of pressure on other liquids and their boiling points
  • Learn about pressure cooking and its applications in culinary science
  • Investigate the properties of water under varying pressure conditions in closed systems
USEFUL FOR

Students in physics or chemistry, engineers working with pressure systems, culinary professionals using pressure cookers, and anyone interested in the physical properties of water under pressure.

Ask1122
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Hi all, for a closed container with water under pressure in it, let's say GAUGE PRESSURE of the container is 101 kPa, what will the boiling point of water in that vessel be? Will it be 100 deg C, or will it be 120 deg C because the ABSOLUTE PRESSURE of the water in that vessel is 202kPa? Basically I wanted to see if boiling point is dependent on ABSOLUTE PRESSURE or GAUGE PRESSURE!
Thanks!
 
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Well, hopefully you know that when the absolute pressure is 1 atm (gauge pressure = 0, relative to 1 atm), the boiling point is 100 C.
 

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