Final answer:
The dew point temperature for air with a specific humidity of 8.5 kg H2O/kg air, as inferred from the reference, is 10.0°C, which is when the relative humidity would be 100%.
Step-by-step explanation:
The question pertains to determining the dew point temperature of the air given a specific humidity level. From the information provided, an air sample with a specific humidity holds 8.5 kg of water vapor per kilogram of air. To find the dew point, we would typically use a psychrometric chart or dew point calculator, referencing the amount of water vapor present at different temperatures until reaching the saturation point where the relative humidity is 100%. However, the question appears to grant a contextual hint that implies the given air sample's dew point temperature aligns with the condition where the air contains 9.40 g/m³ of water vapor.
Based on the reference information, the air with 9.40 g/m³ of water vapor reaches 100% relative humidity at 10.0°C. In this scenario, 10.0°C is the temperature at which the relative humidity will be 100%, and it is also known as the dew point. Since the scenario detailed in the question closely mirrors the reference condition, the dew point temperature for the air with a specific humidity of 8.5 kg H2O/kg air would also be 10°C.
The correct answer to the given question, based on the context provided, is 10°C, matching option (a).