For a pure fluid at a fixed temperature and pressure: i the volume, but not the

Question

For a pure fluid at a fixed temperature and pressure: i the volume, but not the density, can vary i the density, but not the volume, can vary both the density and volume can vary (although in opposite directions) neither the volume nor the density can vary Which of the following objects is doing boundary work: an air-filled balloon that is expanding due to heating a brick that is falling to the ground a hose with water flowing through it a fence surrounding a yard Which of the following is a correct unit of internal energy: Joules per Kelvin Joules per mole Joules per meter Joules per second which of the following is a state property of a system: the heat added to the system the work done by the system the placement of the system in Pennsylvania the enthalpy of the system

Explanation / Answer

1.) A .. volume can change by changing mass.. but density will remain constant for constant temperature

2.) A.. baloon (boundary) is expanding.. so boundary work is done

3.) B.. joules per mole

4.) D.. enthalpy, internal energy and entropy they depend only on state

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