24 On a hot day, on a remote planet, the temperature can reach a point where lakes of liquid water are just boiling. In these conditions, it is observed that the relative humidity of surrounding atmospheric air is about 18 % and, when all temperatures are expressed in °C, the temperature of the dew point of the atmospheric air is half of the temperature of the boiling point of liquid water. What is the atmospheric pressure? Refer to the table below as required. Saturated vapour pressure of water 50 60 70 °C 30 40 45 80 90 100 35 Pa 4,240 5,630 7,340 9,550 12,300 19,900 31,200 47,300 70,100 101,000 Select the closest answer: O 19900 Pa O 70100 Pa O 47300 Pa O 101000 Pa O 31200 Pa

24 On a hot day, on a remote planet, the temperature can reach a point where lakes of liquid water are just boiling. In these conditions, it is observed that the relative humidity of surrounding atmospheric air is about 18 % and, when all temperatures are expressed in °C, the temperature of the dew point of the atmospheric air is half of the temperature of the boiling point of liquid water. What is the atmospheric pressure? Refer to the table below as required. Saturated vapour pressure of water 50 60 70 °C 30 40 45 80 90 100 35 Pa 4,240 5,630 7,340 9,550 12,300 19,900 31,200 47,300 70,100 101,000 Select the closest answer: O 19900 Pa O 70100 Pa O 47300 Pa O 101000 Pa O 31200 Pa