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    Master this deck with 20 terms through effective study methods.

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    Created by @nari

    What is the first principle of thermodynamics?

    Energy cannot be created or destroyed, only transformed.

    What defines an electrothermal system?

    Contains magnetic, electrical, and internal energy.

    How does Joule effect influence temperature?

    It dissipates energy, raising the internal energy of materials.

    What is the purpose of the method of balances?

    To account for energy and material exchanges in a system.

    What distinguishes a permanent regime from a transient regime?

    Permanent regime has no time-dependent changes in state.

    What is a system in the context of engineering?

    An organized collection of elements designed for a specific function.

    What happens during energy exchanges in an electrothermal system?

    Energy can only change through thermal interactions with the environment.

    What is the significance of Lavoisier's phrase in energy balances?

    It emphasizes the conservation of energy in any transformation.

    What are extensive variables in thermodynamics?

    Quantities that can be summed, like mass or energy.

    What is the role of conventions in establishing a balance?

    They determine how to assign signs to quantities in the equations.

    What are the three main phases of matter?

    Solid, liquid, and gas.

    How does a solid differ from a liquid?

    Solids have a rigid structure and significant deformation energy.

    What characterizes a liquid phase?

    Low deformation energy and no fixed shape.

    What happens to a gas when pressure is applied?

    It changes volume more easily due to weak intermolecular forces.

    What is mass density?

    Mass per unit volume of a substance.

    How is total energy related to mass density and internal energy?

    Total energy equals mass density times internal energy per unit volume.

    What is enthalpy in a phase at constant pressure?

    It combines internal energy and pressure-volume work.

    How do temperature changes affect mass density and energy in phases?

    They typically depend on temperature for liquids and solids.

    What is the formula for mass flow rate through a surface?

    Mass flow rate equals density times velocity times area.

    What is energy convection?

    Transport of energy by moving matter, expressed through enthalpy.