This lesson covers the concepts of humidity and temperature calculations in different scenarios. It provides a detailed explanation of how to determine relative humidity, humidity ratio, and dew point temperature using steam tables and the ideal gas equation. The lesson also discusses the practical applications of these concepts, such as extracting water from air and the effects of compression on air's humidity and temperature. It further explains how to calculate the amount of water that condenses during a cooling process and the final pressure of the system. The lesson uses worked examples to illustrate these concepts, making it easier for learners to understand and apply them in real-world situations.

- The relative humidity and humidity ratio can be determined using the given dew point temperature and the steam table.
- The maximum amount of liquid water that can be extracted from air can be calculated using the given relative humidity and the ideal gas equation.
- The process of compressing air in a polytropic process and cooling it at a constant volume can be understood using the first law of thermodynamics.
- The concepts of relative humidity, humidity ratio, and saturation pressure are interlinked and can be applied in practical situations.

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