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Would anyone be able to walk me through this?
Okay, so this is the chart that is given, and you have to fill in the blanks. I somewhat understand that you need to use P1V1/T1 = P2V2/T2. What I'm confused on is what does "Constant" stand for in an equation?
For instance, I know that for the first line you would use V2=P1V1T2/T1P2, but how to I sub "Constant" into that equation? What does it stand for?
P1 (kPa) P2 (kPa) V1(L) V2(L) T1(K) T2 (K) Name of Law
Constant Constant 0.45 ? 298 285 ?
100.1 160.3 ? 3.6 Constant Constant ?
101.3 ? Constant Constant 298 273 ?
After I worked so hard spacing that silly chart out it didn't even work properly, but OH! Okay, now I'm getting it.
2 Answers
- kumorifoxLv 79 years agoFavorite Answer
If any of these terms is constant, you can omit it from the equation.
If T is constant, then you can just write P1V1 = P2V2. Substitute the values for those variables, and determine which law you are dealing with (This one happens to be Boyle's Law).
- HalchemistLv 79 years ago
Take Boyle's law P2/P1 = V1/V2 or as better expressed PV = C, a constant. P and V are inversely proportional. So as P increases, V decreases. Take a system at constant temperature. P = 2.0 atm, V = 2.0L, PxV =C C = 2.0x2.0 = 4.0 L atm. If the pressure changes to 1.0 atm, what happens to the volume? 1.0 L x V = 4.0 L atm, V = 4.0 L. For this system the constant is 4.0 L atm. It will be different from another PV system. Likewise V/T = C' and P/T = C". So TV/P also =C''' for each system. For most calculations just use P1V1/T1 = P2V2/T2.
