Total Heat Flow Calculation for Isothermal Expansion of Diatomic Gas

AI Thread Summary
The discussion focuses on calculating the total heat flow for an isothermal expansion of a diatomic gas. The problem involves 3.8 moles of gas expanding from 1.9 m³ to 10.5 m³ at an initial pressure of 1.38 atm, followed by a temperature increase of 35 K at constant volume. Participants are attempting to apply the Q = -W formula for isothermal processes but are struggling to determine the work done (W). There is mention of using graphical methods to find the integral, but some provided data, such as temperature, seems underutilized. The conversation emphasizes the need for a clear approach to calculating work in reversible expansion scenarios.
brandonmm1
Messages
2
Reaction score
0

Homework Statement



n = 3.8-mol of diatomic gas is allowed to expand isothermally from Vini = 1.9-m3 to Vfin = 10.5-m3. The initial pressure is Pini = 1.38-atm. After this the gas is raised at a constant volume by a temperature ΔT = 35-K. Calculate the total heat flow into the gas.

Homework Equations

The Attempt at a Solution

 
Physics news on Phys.org
Please show your attempt at a solution (forum rules).
 
CWatters said:
Please show your attempt at a solution (forum rules).
I tried to use the Q=-W formula for isothermal. But I don't know how to find the W. Other than that, I also tried to use the graph and find the integral, but in using the graph some of the information given is not used(temperature)
 
Assuming that the expansion is carried out reversibly, what is your algebraic result for the amount of work that is done?
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

What is the molar heat capacity of an ideal gas at constant pressure and volume?
Replies
5
Views
3K
Minimum heat removed from gas to restore its state
Replies
5
Views
3K
Efficiency of a Heat Engine: How to Calculate Heat Transfer in a Monotonic Gas
Replies
3
Views
2K
Reversible Isothermal Expansion Steam
Replies
2
Views
3K
Isothermal Expansion of a Diatomic Gas
Replies
5
Views
3K
How Is Work Calculated for a Gas and Balloon in Isothermal Expansion?
Replies
11
Views
4K
How do I calculate work and heat in a PV diagram for an ideal monoatomic gas?
Replies
11
Views
2K
Trouble solving for end state of two control volumes in a rigid tank
Replies
12
Views
2K
PV Diagram Problem: Calculate Net Heat & Work Done
Replies
2
Views
1K
Thermo: isothermal, reversible expansion of ideal gas
Replies
4
Views
3K

Hot Threads

Recent Insights

Back
Top