Convert a pressure of 23.8 in. Hg into kilopascal.
Ok so I looked up kilopascal and it Said 1 Kpa = 1000 pa
So I began to set it up like this 23.8 / 29.2 x1000 am I correct
Chemistry - DrBob222, Thursday, October 13, 2011 at 1:48pm
I don't think that will get it. I would go this route.
23.8 inches x (25.4 mm Hg/1 inch Hg) x (1 atm/760mm) x (101.325 kPa/1 atm) = ??
There are MANY other steps that will work; I just use those conversion factors with which I'm familiar. I've memorized just a few conversions to help my tired brain.
Chemistry - Monique , Thursday, October 13, 2011 at 2:44pm
DrBob222 I used 29.2 in Hg because my book gave me 1 atm = 29.92 in. Hg. But why did you use 1atm/760mm
I just used factors I remember.
23.8 inches is the problem. That's what we want to convert.
(25.4 mm/1 inch) converts inches to mm Hg, (1 atm/760 mm) converts mm to atm, and (101.325/1 atm) converts atm to kPa.
You looked up 29.92 inches Hg = 1 atm (and I didn't use that because I just don't remember that) however, you can use it as follows:
23.8 inches x (1 atm/29.92 inches) x 101.325 kPa/atm) = and you get the same answer with few steps. Your factor converts inches Hg to atm, then all you needed to do was multiply by the factor to convert atm to kPa.
Well, Monique, it looks like you and Dr. Bob222 are on opposite sides of the "conversion controversy." It's like the battle of the conversion factors! Who will win?
But let's not get caught up in the drama of it all. Instead, let's focus on the question at hand. To convert 23.8 in. Hg to kilopascals, you can use either method, as long as you're using the correct conversion factors.
Now, I won't bore you with all the details, but here's the math for both methods:
Method 1 (Monique's method):
23.8 in. Hg x (1 atm/29.92 in. Hg) x (1000 kPa/1 atm) = ??
Method 2 (Dr. Bob222's method):
23.8 in. Hg x (25.4 mm Hg/1 in. Hg) x (1 atm/760 mm Hg) x (101.325 kPa/1 atm) = ??
After all the calculations, you should end up with the same answer in kilopascals. So, in the end, it's all about using the conversion factors that work for you and making sure you get the right answer. Good luck, you conversion warriors!
DrBob222 used the conversion factor 1 atm/760mm because 760 mm Hg is equal to 1 atmosphere (atm). The value 29.92 in Hg is approximately equal to 760 mm Hg, which is why you used 29.2 in Hg in your calculation. These values are used to convert between different units of pressure.
To convert a pressure from inches of mercury (in. Hg) to kilopascals (kPa), you need to use conversion factors. Here's how you can do it:
1. Start with the pressure given in inches of mercury (in. Hg). In this case, it's 23.8 in. Hg.
2. Use conversion factors to cancel out the units and convert to kilopascals (kPa). Here are the conversion factors:
- 25.4 mm Hg = 1 inch Hg
- 1 atm = 760 mm Hg
- 1 atm = 101.325 kPa
3. Set up the conversion factors in a way that the units cancel out and you are left with the desired unit, which is kPa.
Using the conversion factors provided by DrBob222, the calculation would look like this:
23.8 inches x (25.4 mm Hg/1 inch Hg) x (1 atm/760 mm Hg) x (101.325 kPa/1 atm)
Let's break down the steps in this calculation:
- Multiply 23.8 inches by the conversion factor (25.4 mm Hg/1 inch Hg) to cancel out the inches of mercury unit and obtain pressure in millimeters of mercury (mm Hg).
- Multiply the result by the conversion factor (1 atm/760 mm Hg) to cancel out the millimeters of mercury unit and obtain pressure in atmospheres (atm).
- Finally, multiply by the conversion factor (101.325 kPa/1 atm) to cancel out the atmosphere unit and obtain pressure in kilopascals (kPa).
By performing the calculations, you will get the pressure in kilopascals.