Which of the following is true about an adiabat\'s position on a PV diagram comp

Question

Which of the following is true about an adiabat's position on a PV diagram compared to an isobar's position for the expansion of 1 mole of an ideal gas? (a) The isotherm is above the isobar because the isotherm can absorbs heat during expansion making it able to do more work. (b) The adiabat is below the isobar because the adiabat releases heat during expansion making it able to do less work. (c) The isotherm is below the adiabat because the isotherm releases heat during expansion making it able to do less work. (d) The isobar is above the adiabat because the isobar absorbs heat during expansion making it able to do more work.

Explanation / Answer

(a) Isotherm is below isobar, as isobar is just a horizontal graph, parallel to Volume axis.

(B) adiabatic is below isobar,but heat is not exchanged in adiabatic process.

(C) isotherm is above adiabate.

(D) TRUE: Isobar is above adiabate, and as this is constant pressure process, heat added is required to do work againt increasing the volume as pressure is constant.

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