What volume would 100 moles of H2 occupy at STP?

Question

Using PV = nRT, where R=.082.

Please show the work. I have many more questions like this to do, and I need to see how its done.

10 points to the first satisfactory answer...

JB, the odds proclaimed by creationists as to the improbability of evolution do not demonstrate the impossibility of life arising in simple form from nonlife by way of a long and propitious series of chemical steps/selections.

They are the odds of complex, "already evolved," forms of life arising from nonlife...

Answer 1

22.4 Liters at STP times 100. (Quite the standard.)

Here is web help, but you need to work Chemistry formulas yourself and understand math well to work with functions/formulas.

http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/idegas.html

email if you want help grasping Chemistry.

Answer 2

First of all, you state your R as 0.082. This has no meaning because you didn't include any units. The only thing close I can find is 0.0082 L atm / K mol. I hate using atmospheres so I'm going to use kPa and an R value of 8.31 L kPa / mol K.

Anyway, first step is always to list your known values. These include:

R = 8.31 L kPa / mol K
n = 100 mol H2
P = 101.3 kPa (because of STP) [correction*]
T = 273.15 K (because of STP)
and last, your unknown that you're trying to find:
V = ?

Perfect. We have an equation (PV = nRT) with five variables, four of which we know, so we can solve for the fifth. First, manipulate the equation so that you isolate the unknown variable:

PV = nRT
V = nRT/P (divide both sides by P)

Good, now we substitute our known values in:

V = (100 mol H2)(8.31 L kPa / mol K)(273.15 K) / (101.3* kPa)

Then calculate:

V = 2.24 x 10^3 L H2

Know that if you use atm instead of kPa, you'll still get the same answer as long as you use the appropriate value of R.

Note: ALWAYS include units. Everywhere. Not just the answer.

Email me if you have any issues.

Hope this helps.

*Note: because of the different definitions of STP, I managed to get the wrong STP/gas constant combination. I have fixed the issue by using the less common definition of STP (101.3 kPa at 273.15 K)

**The good thing about doing it this way (the long way) is that you get practice working with the PV = nRT equation, in case they throw non-STP conditions at you.

Answer 3

This is nothing to do with your question but i saw some of your answers on religion and your obviously challenged by christianity because of your knowledge of science. What about the whole evolution theory thing surely you know about the probability that evolution actually took place?. you think that science and religion clash but they work together. some of the best church leaders i know have been top scientists, doctors and physics proffessors. Christians aren't just being ignorant to science. Ne way u seem intelligent. Do ur own homework!

Answer 4

H2 can be assumed to behave like an ideal gas.
An ideal gas occupies 22.4 litres per mole at STP (0C,760mm Hg )
Therefore 100 moles occupy 2240 litres

Answer 5

one mole of any gas occupies 22.4 liters ay STP. H2 is a gas. 100 moles would occupy 2240 Liters.