1 Thermodynamic Systems and Properties Online Quiz Questions

A fixed amount of gas is sealed inside a piston–cylinder. The piston can move, and energy may cross the cylinder boundary. How should the gas be classified?

True or false: The change in a thermodynamic property between two states depends only on those states, not on the process path taken between them.

Which listed property is extensive?

Select all statements that correctly describe thermodynamic boundary interactions.

True or false: For a simple compressible substance, two independent intensive properties specify an equilibrium state.

Which conditions are consistent with thermodynamic equilibrium? Select all that apply.

For a pure substance in a two-phase liquid–vapor mixture, why are saturation temperature and pressure not enough as two independent state variables?

A substance is at $25\ ^\circ\mathrm{C}$. Using $T\,[\mathrm K]=t\,[^\circ\mathrm C]+273.15$, what is its absolute temperature?

A uniform material has density $\rho=2.5\ \mathrm{kg/m^3}$. What is its specific volume?

A sealed metal tank contains gas. The tank does not deform, and its walls allow heat to pass between the gas and the room. Treat the gas as the system. Classify the system and describe the tank boundary in terms of mass transfer, energy transfer, motion, and heat transfer.

For a known ideal gas, pressure and absolute temperature are specified. According to the ideal-gas model, which listed property can be determined from those values?

True or false: A well-insulated, sealed container may approximate an isolated system, even though perfect isolation is an idealization.

A turbine is operating, with fluid entering and leaving while energy is transferred. Which system classification applies?

A uniform sample is doubled in amount while its condition remains the same. Which property does not double?

What is the singular term for an extensive property expressed per unit mass?

A boundary is described as both rigid and diathermal. What does this mean?

Convert $25.00\ ^\circ\mathrm{C}$ to kelvins using $T\,[\mathrm K]=t\,[^\circ\mathrm C]+273.15$. Enter the numerical value.

A pure substance is a two-phase liquid–vapor mixture at saturation. Since its saturation temperature and pressure are linked, which additional property can help specify its state?