Recent content by susdu

I have three elements, A, B, C, that under certain conditions (rapid heating and cooling) form one ABC phase solid. Sometimes when I add a fourth element, D, I get two phase (AB,CD) solid. Obviously this phenomena is thermodynamically favourable. My guess (still undergraduate) is that there...

I think it finally settled in my mind. Thank you guys for your patience.

I'm familiar with those concepts, my question is: why there is no reversible adiabatic path between A and B? Why it isn't possible for A: p1,t1,v1 and B: 2p1/3,t2,v2

How do I know this?

Thanks for the detailed explanation. How can I tell if such a path is possible or not? It really seems weird that the irreversible path is adiabatic but the reversible path is not. What is the explanation for this?

It's the only equation we learned to calculate the entropy change directly. The solution also uses this form.

Homework Statement 1 mol of monoatomic ideal gas (temperature T1) is inside a cylinder with a moving piston (all are isolated). The initial external pressure on the piston is P1. at some point the external pressure is changed to (2/3)P1, the gas undergoes (irreversible) adiabatic expansion...

Thanks for the clear explanation, feels like a stone choked down :)

isn't the enthalpy change for isothermal process in ideal gas 2.5nR(Tf-Ti)

Given some chemical reaction, A+B -> C+D (all are ideal gases) that occures in 298K and 1 atm. why can't I automatically say that ΔH=0 for this reaction? I know that enthalpy is a state function that is dependent on temperature alone (for an ideal gas), and the final and initial temperature...

Can you give an example of a constant pressure process where the enthalpy change equals the heat? (I can't seem to distinguish between the given scenarios)

Sometimes I tend to over complicate things, thank you.

61.9Hz is nth harmonic (first,second,third etc)

You're right, but wouldn't that change the harmonic 61.9Hz belong to?

Homework Statement An experiment was conducted with a string. the following successive harmonics were measured: 46.9Hz, 53.7Hz, 61.9Hz, 70.9Hz a. Evaluate the fundamental frequency b. which harmonic corresponds to the 61.9Hz frequency? Homework Equations The Attempt at a...