Adiabatic process Definition and 117 Threads

If a process is adiabatic and reversible, such as a gas in a tube that has been compressed, is it true to say that there is no change in entropy from the gas being uncompressed to being compressed? If not, why not?

Homework Statement 3.14 (0.5) How is the fractional change in temperature related to \frac{dT}{T} the fractional change in pressure \frac{dP}{P} ? (IPhO 2006) Homework Equations PV^{\gamma}=\rm constant The Attempt at a Solution nC_vdT=-PdV (1), dV/dP=-nRT/(P^2) If I...

fully adiabatic process? :confused: by definition i know that adiabatic process is a thermodynamic process in which there is no heat transfer and it the same time i also know that nothing is frictionless even though we sometimes assume thing to be. so therefore there will be always heat...

:confused: :confused: i was reading my lecture note over the half term but i am still a bit confused and i was wondering if someone could describe in detail, using a p-v diagram, a well known engineering cycle which specifies a isothermal or adiabatic process. Thanks you very much

Homework Statement It is said that the work done between 2 isothermals is independent of the adiabatic. Homework Equations The work done during an adiabatic process is given by, W = C(v){T1 – T2) The Attempt at a Solution From the above equation it is clear...

Two cylinders of equal volume are connected by a valve. We are given the pressure for one of them, and then told to find the final equilibrium pressure after the valve is opened. Adiabatic process may be assumed. I know the solution, but not sure why its that way... initially, I tried...

I was just wondering if there is a relationship between Pressure, Temperature , and Volume like there is for Ideal Gases, but for water. ie. for Ideal Gas: TV^(gamma-1) = constant PV^gamma = constant Any insight would be greatly appreciated, Thanks in advance.

How do you calculate the work done in an adiabatic process? I know change in thermal energy = work done. which amounts to (f/2)Nk(change in T). But how do you get change in T? Or is there another way to compute the work directly. The trouble is both the volume and temperture vary during...

During the compression stroke of a certain gasoline engine, the pressure increases from 1.00 atm to 20.3 atm. Assume that the process is adiabatic and the gas is ideal with (gamma)= 1.40. (a) By what factor does the volume change? Vfinal = (ans)*Vinitial (b) By what factor does...

All the places I've searched I find that the change in the internal energy for the adiabtic process is dU = C_V\,dT But I don't understand why they use C_V, neither the volume nor the preassure is constant during the adiabtic process.. I know that dU = C_V\,dT = C_p\,dT - p\,dV...

In an Adiabatic Process no heat energy is trasferred into or out of the system so there is no energy change, BUT, there is a change in pressure, volume and temperature. But when atoms or molecules gain/loose heat energy they vibrate more/less respectively. And the measure of the vibration of...

Hello Friends! can anybody help me? show that for a quasi static adiabatic process of an ideal gas, the following reaction holds TV^{\gamma-1}}=constant Secondly::: At about 100ms after detonation of a uranium fission bomb, the "ball of fire" cosists of a sphere of gas with a...

Why doesn't an irreversible adiabatic process follow the equation, PV^(gamma)=constant?

I have a question regarding Carnot Cycles and Adiabatic processs. I have cylinder with n moles of a mono-atomic gas with a specific Volume, Pressure and Temperature. This Cylinder is closed by a piston. This system undergoes the four step Carnot Cycle A-B, B-C, C-D and D-A. A-B: Is...

I have 5.00 mol of O2(Oxygen) at 20.0 Celsius and 1.00atm. I will compress this to 1/10 the original volume. Find the work? The correct answer is 46.1 Kj I am having a terrible time with this. This is what I know: Q = 0 for an adiabatic process, and the change in internal energy is...

Hi there, after years of blissful unawareness, I suddenly managed to find a simple yet, annoyingly perplexing question regarding our old friend, the adiabatic process. Let's look at the facts. Any textbook will tell us that in an adiabatic process no heat is exchanged between the system and...

I have this problem and I do not have the answer, but I get an answer that I feel is probably wrong, so can someone please check my work and point out where I went wrong?? Here is the problem: moles = 0.10 of O_2 T(initial) = 150 C = 423 K P(initial) = 3.0 atm = 303.9 KPa The gas...