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12. If an air/water vapour mixture starts at 30% relative humidity, and you add more water vapour to increase the relative humidity to 60%, while keeping the temperature constant. Has the energy of the air/water vapour mixture? a. gone up b. gone down c. stayed the same 13. If an air/water vapour mixture starts at a temperature of 20°C, and you increase the temperature to 30°C, while keeping the moisture content constant, has the energy of the air/water vapour mixture? a. gone up b. gone down c. stayed the same

12. If an air/water vapour mixture starts at 30% relative humidity, and you add more water vapour to increase the relative humidity to 60%, while keeping the temperature constant. Has the energy of the air/water vapour mixture? a. gone up b. gone down c. stayed the same 13. If an air/water vapour mixture starts at a temperature of 20°C, and you increase the temperature to 30°C, while keeping the moisture content constant, has the energy of the air/water vapour mixture? a. gone up b. gone down c. stayed the same

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Water in Air 9. At 25°C, an air/water vapour mixture can hold a maximum of 0.02 kg of water vapour in 1 kg of dry air. This air/water vapour mixture is then considered to be fully saturated, or at 100% relative humidity. If another air/water vapour mixture is at 25°C and at 50% relative humidity, how much water vapour is in 1 kg of dry air? Answer in kg of water vapour per kg of dry air. 10. Recalling the metric psychrometric chart from your Building Science and the Environment (GSCI 1022) course, what is the item measured along the bottom axis of the chart, and in what units is it measured? 11. For the same chart from question 10. On the right axis of the metric psychrometric chart, what is the item measured, and in what units is it measured? 12. If an air/water vapour mixture starts at 30% relative humidity, and you add more water vapour to increase the relative humidity to 60%, while keeping the temperature constant. Has the energy of the air/water vapour mixture? a. gone up b. gone down c. stayed the same 13. If an air/water vapour mixture starts at a temperature of 20°C, and you increase the temperature to 30°C, while keeping the moisture content constant, has the energy of the air/water vapour mixture? а. gone up b. gone down c. stayed the same
Transcribed Image Text:Water in Air 9. At 25°C, an air/water vapour mixture can hold a maximum of 0.02 kg of water vapour in 1 kg of dry air. This air/water vapour mixture is then considered to be fully saturated, or at 100% relative humidity. If another air/water vapour mixture is at 25°C and at 50% relative humidity, how much water vapour is in 1 kg of dry air? Answer in kg of water vapour per kg of dry air. 10. Recalling the metric psychrometric chart from your Building Science and the Environment (GSCI 1022) course, what is the item measured along the bottom axis of the chart, and in what units is it measured? 11. For the same chart from question 10. On the right axis of the metric psychrometric chart, what is the item measured, and in what units is it measured? 12. If an air/water vapour mixture starts at 30% relative humidity, and you add more water vapour to increase the relative humidity to 60%, while keeping the temperature constant. Has the energy of the air/water vapour mixture? a. gone up b. gone down c. stayed the same 13. If an air/water vapour mixture starts at a temperature of 20°C, and you increase the temperature to 30°C, while keeping the moisture content constant, has the energy of the air/water vapour mixture? а. gone up b. gone down c. stayed the same
14. If an air/water vapour mixture starts at a temperature of 20°C with 0.01 kg water vapour per kg dry air. You increase the temperature to 30°C, while keeping the moisture content constant at 0.01 kg water vapour per kg dry air. Has the relative humidity? a. gone up b. down gone c. stayed the same Sensible Heat Factor Moisture Content kg/kg Dry Air 1.0 Enthalpy Devlation KJ/kg Dry Air 8'0 30% Reletive Humidity. 0g % 06 % 001 SOL 110 115 00L 08 09 OS 45 40 Enthalpy At Saturation k/kg Dry Air SE PSYCHROMETRIC CHART 0.033 NORMAL TEMPERATURES 0.032 SI METRIC UNITS - 0.031 Barometric Pressure 101.325 kPa 6z00 SEA LEVEL 0.027 Below 0 CProperties and Enthalpy Deviation Lines are For Ice 0.026 0.45 0.025 oso Ezoo - 0.022 ozo'o 610'0 - 0.018 09'0 JE0017 E0.65 9100 0.014 Temperature C a 900'0 Dry Bulb Temperature C Volume m/kg Dry Air
Transcribed Image Text:14. If an air/water vapour mixture starts at a temperature of 20°C with 0.01 kg water vapour per kg dry air. You increase the temperature to 30°C, while keeping the moisture content constant at 0.01 kg water vapour per kg dry air. Has the relative humidity? a. gone up b. down gone c. stayed the same Sensible Heat Factor Moisture Content kg/kg Dry Air 1.0 Enthalpy Devlation KJ/kg Dry Air 8'0 30% Reletive Humidity. 0g % 06 % 001 SOL 110 115 00L 08 09 OS 45 40 Enthalpy At Saturation k/kg Dry Air SE PSYCHROMETRIC CHART 0.033 NORMAL TEMPERATURES 0.032 SI METRIC UNITS - 0.031 Barometric Pressure 101.325 kPa 6z00 SEA LEVEL 0.027 Below 0 CProperties and Enthalpy Deviation Lines are For Ice 0.026 0.45 0.025 oso Ezoo - 0.022 ozo'o 610'0 - 0.018 09'0 JE0017 E0.65 9100 0.014 Temperature C a 900'0 Dry Bulb Temperature C Volume m/kg Dry Air
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