1. (V1/T1) = (V2/T2)
What throws students on this kind of problem is that they don't give an initial volume and you must use that and what that volume changes to. The easy way to do these is to assume an initial volume for V1 (any convenient number will do), then take 1/2 that for V2. Then just plug into the equation.
2. Do you know what STP means. Temperature of 273 and pressure of 1 atm. Use same equation as in 1.
3. Now that you know what STP is use (P1/T1) = (P2/T2). You don't need to worry about the 22.4 L (v1 or v2) since that doesn't change.
Use
I need help on these last three problems on my Hw.
1. A 10.0 L sample of gas at 3.00 degrees Celsius is cooled at a constant pressure until it reaches 1/2 of its original volume. At what temperature in K will this volume be reached? (Charles law)
2. 994 mLof gas is collected at STP. At what temperature (in kelvin) will the volume be 590 mL if the pressure remains constant? (Charles law)
3. 22.4 L of gas fills a container at STP (what does STP mean?) If the volume remains constant and the gas is heated to 350 K, what is the new pressure? (In arm) (gay-lussacs law)
1 answer