T(oC) 0 5 10 15 20 40 60 S.V.P (mmHg) 4.58 6.51 8.94 12.67 17.50 55.10 149.00 The table above shows the saturation vapour pressure against temperature in a ...

The table above shows the saturation vapour pressure against temperature in a certain town. If the vapour pressure in this town at 20oC is 10mmHg, what is the relative humidity?

Answer Details

To find the relative humidity, we need to first calculate the actual vapour pressure (e) at 20°C using the table. We know that the saturation vapour pressure (e_s) at 20°C is 10 mmHg, but we need to determine the actual vapour pressure to calculate the relative humidity. From the table, we can see that the saturation vapour pressure at 20°C is 17.50 mmHg. Since the actual vapour pressure is given as 10 mmHg, we can calculate the relative humidity using the following formula: Relative humidity = (actual vapour pressure/saturation vapour pressure) × 100% Relative humidity = (10/17.50) × 100% Relative humidity = 57.1% Therefore, the relative humidity in this town at 20°C is approximately 57.1%. So, option B (57.0%) is the correct answer.