298 K Ar gas 1.00 dm3 30.00 dm3 isothermal expansion

298 K Ar gas 1.00 dm3 30.00 dm3 isothermal expansion

isothermal expansion of argon gas

from an initial volume of 1.00 dm3 to 30.00 dm3 at 298 K

 

 

(a) For a van der Waals gas, π_T = a / V_m^2.

Calculate ΔU_m for the isothermal expansion of nitrogen gas

from an initial volume of 1.00 dm3 to 20.00 dm3 at 298 K.

What are the values of q and w?

 

(b) Repeat Exercise (a) for argon,

from an initial volume of 1.00 dm3 to 30.00 dm3 at 298 K.

 

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압력 = 1 atm 이라 가정하고,

N2 gas의 몰수를 계산하면,

PV = nRT

 

n = PV / RT

= [(1) (1.00)] / [(0.08206) (298)]

= 0.0409 mol

 

 

 

 

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