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## Homework Statement

I have had a question in my quiz that I don’t remember very well, but here’s a diagram and there’s no need for numbers in axis because it’s a concept- based question with no calculations.

The question asks if an ideal gas system moved from A-B-C-A. Where is the process by which there is no temperature

## Homework Equations

PV=nRT

ΔU=Q-W

Where P is pressure, V is volume, n is the number of moles, R universal gas constant, T is the temperature, U is the internal energy, Q is heat, W is work

## The Attempt at a Solution

From A to B, the pressure didn’t change, so the volume increased ( the gas expands). As indicated in the rule above, as the volume increases the temperature increases. From B to C there is a decrease in pressure, and the volume is constant. An decrease in pressure decreases the temperature. From Ato C, the volume decreased and the pressure increased, and that’s only possible if the temperature is constant or no heat is added. Am I right?