Reversible Process: Final Temp Calc of Argon Mass 12.0g

AI Thread Summary
To calculate the final temperature of 12.0 g of argon expanded reversibly and adiabatically from 1.0 L to 3.0 L, the ideal gas law is initially applied, yielding a pressure of 6.7 atm. However, the discussion highlights that the approach must consider the adiabatic process, which requires a different equation for accurate results. The user is prompted to identify the appropriate adiabatic equation to apply in this scenario. The oversight in the initial calculation is linked to not incorporating the temperature in the pressure calculation. Correctly addressing the adiabatic nature of the expansion is essential for determining the final temperature accurately.
Gil-H
Messages
12
Reaction score
0

Homework Statement


Calculate the final temperature of a sample of argon of mass 12.0 g that is expanded
reversibly and adiabatically from 1.0 L at 273.15 K to 3.0 L.


Homework Equations





The Attempt at a Solution



n = 12[g]/40[g][mol]-1 = 0.3 [mol]

pVi=nRTi

p = 0.3[mol]0.082[L][atm][K]-1[mol]-1/1[L] = 6.7 [atm]

Tf = pVf/nR = 6.7[atm]3[L]/0.3[mol]0.082[L][atm][K]-1[mol]-1 = 817.07 [K]

What is wrong? What have I overlooked?
I think it has something to do with the term 'reversibly', but how?
 
Physics news on Phys.org
Gil-H said:
p = 0.3[mol]0.082[L][atm][K]-1[mol]-1/1[L] = 6.7 [atm]

How can that be correct? You haven't multiplied in the temperature.

To solve this problem, you need to use an equation that's specifically meant for adiabatic expansion/contraction. Do you know the equation?
 
Thread 'Confusion regarding a chemical kinetics problem'

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...
View full post »

Thread 'Prove that evolution is constant (Provide at least two arguments to support your position)'

I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...
View full post »

Similar threads

Chemistry Calculation of thermodynamic variables for irreversible adiabatic process of ideal gas
Replies
9
Views
2K
Work and Volume in Adiabatic Expansion
Replies
11
Views
3K
Reversible Adiabatic Expansion for an Ideal Gas
Replies
1
Views
6K
Don't reversible processes always do the most possible work?
Replies
16
Views
6K
Adiabatic expansion against constant pressure
Replies
6
Views
10K
Chemistry Molar Mass of Unknown Solute and Mole Fraction of Gases
Replies
7
Views
25K
Thermodynamics of a Single-Component Ideal Gas
Replies
1
Views
1K
What is the final pressure of an adiabatically compressed gas in a container?
Replies
1
Views
2K
How can I calculate final pressures in a reversible argon expansion?
Replies
4
Views
3K
How to find maximum work done in an adiabatic process?
Replies
3
Views
6K

Hot Threads

Recent Insights

Back
Top