Question 15
Change of State and VapoursDry bulb: Day 1 30 °C, Day 2 29 °C, Day 3 25 °C
Wet bulb: Day 1 22 °C, Day 2 22 °C, Day 3 21 °C
The readings above are for three consecutive days from a wet and dry bulb hygrometer. It can be concluded that the relative humidity for the three days
- A.increased steadily
- B.remained unchanged
- C.was least on Day 1
- D.decreased steadily
Show the answer and explanation
Answer: A (increased steadily)
Explanation
The difference between dry and wet readings fell from 8 °C to 7 °C to 4 °C. A smaller difference means less evaporation, so the air was getting more humid each day.