Question

Is this isometric?

Answer 1

Oxygen in a piston-‐‐cylinder assembly undergoes an expansion process in which the pressure varies with volume according to the following relation:
= !! +
where A = 0.05 bar-‐‐m3 and B = 3 bar. The initial volume is 0.01 m3 and the final volume is 0.025 m3. Determine the following:
a. Initial pressure in bar.b. Final pressure in bar.c. Boundary work in kJ.

Answer 2

expansion in a cylinder is isometric?

Answer 3

@Photon336

Answer 4

so the piston in the cylinder is changing position meaning the volume is changing with pressure. So would this be a polytropic, not isometric. Because isometric is when V2 = V1

Answer 5

I am convinced this is a closed system... Not an open system

Answer 6

Yeah, if the volume is changing I don't see how it could possibly be isometric by definition like you said. It definitely is a closed system since by definition a closed system is a system that doesn't exchange matter across the boundary of it, so good job so far.

Answer 7

Okay I can figure out the rest. I just wanted to make sure my thoughts were correct. Thanks.

Answer 8

Wait

so this would be polytropic?

Answer 9

Yeah feel free to post your results and I'll check it over. I've actually never heard the term 'isometric' used in thermodynamics before, but I looked it up and it is the same as 'isochoric' which is what I know it as.

I say that because I've never heard the term 'polytropic' before haha, so could you tell me what it means?

Answer 10

I don't exactly know the definition. I know pressure varies with a volume though. Do you want to see the derivation?

Answer 11

PV^n = constant

P = constant/V^n