Energy Transfer

    Master this deck with 26 terms through effective study methods.

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    Created by @mxw1

    What is the total energy of a system?

    Sum of kinetic, potential, flow, and internal energies.

    What defines internal energy?

    Sum of all microscopic forms of energy in a system.

    How does kinetic energy differ from potential energy?

    Kinetic energy is due to motion, while potential energy is due to position.

    What happens to total energy in the absence of magnetic and electric effects?

    It consists solely of kinetic, potential, flow, and internal energies.

    What is the formula for kinetic energy?

    KE = 1/2 mv².

    What is the formula for potential energy?

    PE = mgz.

    What is flow energy?

    Energy required to push an element across a boundary.

    What is the significance of the first law of thermodynamics?

    It states that energy cannot be created or destroyed, only transformed.

    What distinguishes closed systems from open systems in thermodynamics?

    Closed systems do not exchange matter, while open systems do.

    What is the implication of thermodynamic equilibrium?

    No net change in the properties of a system over time.

    What defines the second law of thermodynamics?

    It introduces the concept of entropy and the direction of energy transfer.

    What is a Carnot cycle?

    An idealized thermodynamic cycle that provides maximum efficiency.

    What is the role of emissivity in radiation?

    It measures a material's ability to emit energy as thermal radiation.

    How does conduction differ from convection?

    Conduction transfers heat through materials, while convection involves fluid movement.

    What is Fourier's Law?

    It describes heat conduction through a material.

    What is Newton's Law of Cooling?

    It relates the rate of heat loss of a body to the temperature difference with its surroundings.

    What is the unit of heat transfer rate?

    Measured in Watts (W), equivalent to Joules per second (J/s).

    What defines specific heat capacity?

    Amount of heat needed to raise 1 kg of a substance by 1 K.

    How does specific heat at constant volume differ from constant pressure?

    Constant volume applies when pressure varies; constant pressure applies when volume changes.

    What happens to energy during a phase change?

    Energy is absorbed or released without a temperature change.

    What is latent heat?

    Energy required to change a substance's phase, measured in kJ/kg.

    What is the relationship between heat gained by air and heat lost by coolant in a heat exchanger?

    They are equal in a closed system.

    What is the unit of heat flux?

    Expressed in W/m², indicating heat transfer per unit area.

    What defines the conservation of energy in a system?

    Energy cannot be created or destroyed; it can only change forms.

    What is the significance of using Kelvin for temperature calculations?

    Kelvin is the absolute temperature scale, essential for thermodynamic equations.

    What is the formula for heat transfer in a steady state?

    Heat In equals Heat Out when no reactions occur.