Question

Calculate the heat that must be supplied to 10.5 g of Ne(g) at 0.15 atm to raise its temperature from 24◦C to 54◦C at constant pressure.
Assume that neon behaves as an ideal gas. Answer in units of J.

[So, I know that we would use q = mCDT at some point but because we're missing the specific heat capacity, we can't do that. How can we use pressure as a element in solving this problem? Perhaps there's equation that I'm not recalling. Thanks!]

Answer 1

For an ideal monatomic gas, Cp is (5/2)R. You can read about it here. In fact, several links you can get by Googling "heat capacity ideal gas" explains this better, I think, than the one I'm giving you.
http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/shegas.html

Answer 2

I hope you saw my correction for the bath tub of water. I picked up the dH for H2O2 and not H2O. My eye sight isn't that good anymore and those little subscripts are difficult for me to see. At any rate, I think the big problem you had with that was correcting J to kJ in the last step. But the 890 kJ/mol for the heat of combustion was correct and not that 694 something I wrote.

Answer 3

Alright, thank you. I'l let you know if I run into any more issues. And yes, I did see the correction.