1) How is work related to the sign of W in a PV diagram? a) Positive W means work is done on the system b) Negative W means work is done on the system c) Zero W means work is done d) All work is done with the system 2) Why is water an exception in terms of the slope of the solid/liquid phase line on a phase diagram? a) It has a unique crystal structure b) It has a higher melting point c) It follows Boyle's law d) It undergoes sublimation at standard pressure 3) Which gas law describes the ideal gas behavior in isochoric, isobaric, and isothermal processes? a) Boyle's law b) Charles's law c) Ideal gas law d) Avogadro's law 4) How does the relationship between pressure and volume change during adiabatic expansion? a) Pressure increases, volume decreases b) Pressure decreases, volume increases c) Pressure and volume remain constant d) Pressure and volume fluctuate randomly 5) What is the characteristic of particles in a gas state? a) Tightly packed b) Highly restricted motion c) Arranged in a crystalline structure d) Loosely arranged with no definite shape or volume 6) Which phase change occurs when a substance goes from a gas to a liquid? a) Sublimation b) Deposition c) Condensation d) Vaporization 7) What is the point on a phase diagram where the three states of matter coexist? a) Triple point b) Critical point c) Fusion curve d) Vaporization curve 8) What is the melting phase change also known as? a) Condensation b) Fusion c) Sublimation d) Vaporization 9) When is the substance indistinguishable between liquid and gaseous states on a phase diagram? a) Fusion curve b) Triple point c) Vaporization curve d) Critical point 10) What occurs during sublimation? a) Solid to gas b) Gas to solid c) Liquid to gas d) Solid to liquid 11) What is the phase change represented by the fusion curve on a phase diagram? a) Solid to liquid b) Liquid to gas c) Gas to solid d) Liquid to solid 12) Which state of matter has particles with no definite shape or volume? a) Solid b) Liquid c) Gas d) Plasma 13) What is the critical point on a phase diagram? a) The point where melting occurs b) The point where vaporization starts c) The point of equilibrium between solid and gas d) The point where all phases merge into a single phase 14) What is the significance of a PV diagram in studying heat engines? a) It illustrates pressure and volume changes b) It is irrelevant to heat engines c) It models phase transitions d) It explains gas properties 15) How is work calculated from a PV diagram? a) By finding the slope of the curve b) By calculating the area over the curve c) By calculating the area under the curve d) By determining the intersection points 16) What does the direction of an arrow on a PV diagram indicate? a) The direction of the process b) Volume change c) Temperature change d) Pressure change 17) Which thermodynamic process involves constant pressure? a) Isobaric b) Isochoric c) Isothermal d) Adiabatic 18) What happens to the volume in a sealed container when a force is applied to the piston, causing it to move down? a) Volume increases b) Volume decreases c) Volume remains constant d) Volume becomes undefined 19) What is an ideal gas? a) A gas that only exists in open systems b) A gas that condenses easily c) A gas with a constant volume d) A gas that never condenses, regardless of state changes 20) What does a PV diagram model? a) The relationship between pressure and volume b) The relationship between gas and liquid c) The relationship between volume and temperature d) The relationship between pressure and temperature

Prelim Quiz

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