To determine the specific humidity ω, enthalpy h, wet-bulb temperature Twb, dew-point temperature Tdp, and specific volume of the dry air v, we will use the psychrometric chart.

Step 1: Locate the temperature value on the chart
Locate the temperature value of 38°C on the horizontal axis of the chart.

Step 2: Locate the relative humidity value on the chart
Locate the relative humidity value of 40% on the curved lines of constant relative humidity.

Step 3: Determine the specific humidity ω
Read the specific humidity ω from the intersection point of the temperature and relative humidity lines. This value is typically given in grams of water vapor per kilogram of dry air.

Step 4: Determine the enthalpy h
Read the enthalpy h from the intersection point of the temperature and relative humidity lines. This value is typically given in kilojoules per kilogram of dry air.

Step 5: Determine the wet-bulb temperature Twb
Locate the intersection point of the temperature and relative humidity lines on the curved line for the wet-bulb temperature. Read the wet-bulb temperature Twb from this point.

Step 6: Determine the dew-point temperature Tdp
Locate the intersection point of the temperature and relative humidity lines on the curved line for the dew-point temperature. Read the dew-point temperature Tdp from this point.

Step 7: Determine the specific volume of the dry air v
Using the given temperature and relative humidity values, determine the specific volume of the dry air v using equations or tables specific to the desired calculation.

Note: Without specific values for temperature and relative humidity, the exact values for specific humidity, enthalpy, wet-bulb temperature, dew-point temperature, and specific volume cannot be determined.

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