Question

In: Mechanical Engineering

If the temperature inside a room is 25°C and the temperature outside is ?10°C: a. What...

If the temperature inside a room is 25°C and the temperature outside is ?10°C:

a. What is the maximum relative humidity that can be accommodated inside the room before the window fogs over? (Assume the inside of the window is not insulated from the outside temperature).

b. If it is a double-pane window such that the inside of the window is perfectly insulated from the outside, what will the maximum relative humidity be?

Solutions

Expert Solution


Related Solutions

A thermometer is taken from an inside room to the outside, where the air temperature is...
A thermometer is taken from an inside room to the outside, where the air temperature is −15° C. After 1 minute the thermometer reads 13° C, and after 5 minutes it reads −1° C. What is the initial temperature of the inside room? (Round your answer to two decimal places.) c = ?
In an air conditioning system, the inside and outside conditions of air are 25 °C DBT...
In an air conditioning system, the inside and outside conditions of air are 25 °C DBT and 50% RH, and 40 °C DBT and 27 °C WBT, respectively. The room sensible heat ratio is 0.8, while 50% of the room air is rejected to atmosphere and replaced with an equal quantity of fresh air before entering the air conditioning apparatus. If the fresh air added is 100 m3 /min and the air density is 1.2 kg/ m3 with zero air...
The situations: A) Normal human body temperature is 37°C. Room temperature is more like 25°C. So...
The situations: A) Normal human body temperature is 37°C. Room temperature is more like 25°C. So unless it's really hot out, there is always a temperature difference between your body and its surroundings. What's going on? B) You get too cold, and need to warm up. What happens? C) You get too warm, and need to cool down. What happens? D) Now answer parts A, B, and C for the cold-blooded animal (e.g. reptile) of your choice! For each of...
An uncatalyzed reaction has a rate of 4.4 x 10-7 s–1 at room temperature (25 °C)....
An uncatalyzed reaction has a rate of 4.4 x 10-7 s–1 at room temperature (25 °C). When an enzyme is added the rate is 3.3 x 104 s–1. If the height of the activation barrier for the uncatalyzed rate is 28 kcal/mol, what is the height of the activation barrier for the catalyzed rate? Report your answer in terms of kcal/mol to the nearest tenths. Also, assume the pre-exponential terms for the uncatalyzed and catalyzed reactions are the same.
: A suspension of colloids at room temperature (25°C) contains CaS04 in (a) 3 mM and...
: A suspension of colloids at room temperature (25°C) contains CaS04 in (a) 3 mM and (b) 30 mM concentration. Find the Debye length (in nm) for both the cases. Use relevant data given in lecture 12-13. (c) Why do you suppose the Debye length changes with change in salt concentration? Provide reasoning from colloidal science to support your answer. (d) If NaCI was used instead of CaS04, how would the Debye length values change for cases (a) and (b)?...
In a winter season when outside temperature is –1oC, the inside of house is to be...
In a winter season when outside temperature is –1oC, the inside of house is to be maintained at 25oC. Estimate the minimum power required to run the heat pump of maintaining the temperature. Assume heating load as 125 MJ/h. What would be maximum efficiency of engine that      can be had between the temperatures of 1150oC       and 27oC ? 1.A heat engine is supplied with 278 kJ/s of heat at a constant fixed temperature of 283°C and the heat...
In a winter season when outside temperature is –1oC, the inside of house is to be...
In a winter season when outside temperature is –1oC, the inside of house is to be maintained at 25oC. Estimate the minimum power required to run the heat pump of maintaining the temperature. Assume heating load as 125 MJ/h. What would be maximum efficiency of engine that      can be had between the temperatures of 1150oC       and 27oC ? 1.A heat engine is supplied with 278 kJ/s of heat at a constant fixed temperature of 283°C and the heat...
A composite series wall has an inside surface temperature of 1600F and outside surface temperature of...
A composite series wall has an inside surface temperature of 1600F and outside surface temperature of 500F. If it consists of 3.5 in. of mineral wool, 0.05 in. of plaster on the outside, and 0.75 in. of cork board on the inside, determine the heat loss in a 120 square foot of wall.
5. Henry’s Law Calculate the mass of nitrogen dissolved at room temperature (25 °C) in an...
5. Henry’s Law Calculate the mass of nitrogen dissolved at room temperature (25 °C) in an 80.0-L home aquarium. Assume total pressure of 1.0 atm and a mole fraction of nitrogen of 0.78. Henry’s constant for nitrogen at 25 °C is 6.1*10-4 M/atm.
Suppose outside temperature is 55◦F, while the temperature inside a building is 72◦F. The building is...
Suppose outside temperature is 55◦F, while the temperature inside a building is 72◦F. The building is heated but not air conditioned, so the partial pressure of water vapor is the same both inside and outside the building. Finally, suppose the dew point outside is 40◦F. What is the dew point inside? What are the relative humidities inside and outside the building? (We are most comfortable if relative humidity is between 30% and 50%. This question shows why air in heated...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT