Pressure/Temperature Problem

The formatting made it hard to tell what you were trying to say in your email, but when calculating the effect of temperature on pressure you can use Charles Law: You gave these values: Plugging in the values: Multiplying both sides of the equation by P₂ and switching sides around the equals sign: Now we can multiply both sides by 499.2: And now we can divide both sides by 546: And doing the math gives us: Which is roughly the same answer you got, except that you were a little off because you rounded 39.2 into 39, so it looks like your method was correct.

No, the correct answer is 39. 3500 only has 2 sig figs.

You may be right, I don't know. These are multiple choice tests, and the answers tend to be in round numbers, but I don't have a copy of this test.--Percy

You should round only when giving your answer; you should always use the most precise number available to you during intermediate calculations.

Haha, I suppose you belong to the old school of thought when this was still even an issue. I belong to the newer school of thought when you work out all the variables first and then insert all the values into the final equation to crank out the answer all at once. In other words, there's no such thing as an intermediate calculation, just like there's no such thing as an intermediate evolutionary step. Hey, I just realized something. Are you a creationist trapped inside an evilutionist body?Edit.By the way, you're right. I just glanced through it and thought he was talking about the final answer. Yes, if it was an intermediate calculation, he should have used 39.2. I guess there's always a first time I could be wrong Edit again.Everyone should be required to learn how to use a graphing calculator nowadays. Edited by Taz, : No reason given.Edited by Taz, : No reason given.