Question

If air at 25°C contains 152 cm³ of water vapor, and that same amount of air can hold a maximum of 257 g/cm³ of water vapor at the same temperature, calculate the relative humidity (3 marks).

a) 40%
b) 60%
c) 80%
d) 100%

Answer 1

To calculate the relative humidity, compare the amount of water vapor present in the air to the maximum amount it can hold. In this case, the relative humidity is approximately 59.28%.

Step-by-step explanation:

To calculate the relative humidity, we need to compare the amount of water vapor present in the air to the maximum amount it can hold at that temperature. In this case, the air at 25°C contains 152 cm³ of water vapor, and it can hold a maximum of 257 g/cm³ at that temperature.

We can calculate the relative humidity using the formula:
Relative Humidity = (Amount of Water Vapor / Maximum Water Vapor Capacity) * 100%

Plugging in the values, we get:
Relative Humidity = (152 cm³ / 257 g/cm³) * 100% = 59.28%

Therefore, the relative humidity is approximately 59.28%. So the correct answer is 60% (b).