CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A moist air sample has dry bulb temperature of 30C and specific humidity of 11.5 g water vapour per kg dry air. Assume molecular weight of air as 28.93. If the saturation vapour pressure of water at 30C is 4.24 kPa and the total pressure is 90 kPa, then the relative humidity (in %) of air sample is

A
50.5
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
38.5
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
56.5
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
68.5
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 38.5
Relative humidity,

ϕ=pvpvs

Specific humidity,

ω=0.622(pvppv)

11.5×103=0.622(pv90pv)

pv=1.63378KPa

Relative humidity,

ϕ=pvpvs=1.633784.28=0.385

= 38.5%

flag
Suggest Corrections
thumbs-up
1
similar_icon
Similar questions
View More
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Summary
GEOGRAPHY
Watch in App
Join BYJU'S Learning Program
CrossIcon