TºC
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 certain town. If the vapour pressure in this town at 20oC is 10mmHg, what is the relative humidity?
A
170.0%
B
57.0%
C
17.5%
D
10.0%
Verified Correct Answer: B.
Physical Principles & Numerical Solution
R.H = \(\frac{Partial Pressure of Water Vapour Present}{S.V.P at temperature of atmosphere}\) x 100
= \(\frac{10}{17.50}\) x 100
= 57.14% ≈ 57%
Source: Myschool Past Questions Archive (Record #12275)