Thermodynamics B/C

[Jacobi]

What is the equation for the efficiency of a Carnot heat engine?

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?

Yep!

[UTF-8 U+6211 U+662F]

All right, define heat, temperature, thermal energy, and internal energy. Include SI units.

[Jacobi]

All right, define heat, temperature, thermal energy, and internal energy. Include SI units.

Answers (Click to Show Hidden Text)

Heat is the transfer of energy in the form of temperature.  It is in Joules.
Temperature is a quantitative measure of the thermal energy of a system.  It is measured in Kelvins.  It is related to the particle's speeds of random motion.
Thermal energy is the kinetic energy of particles moving randomly in a substance. It is measured in Joules.
Internal energy is thermal energy along with chemical energy, nuclear energy, and all other forms of non-macromechanical non-radiant energy.  It is in Joules.

[UTF-8 U+6211 U+662F]

All right, define heat, temperature, thermal energy, and internal energy. Include SI units.

Answers (Click to Show Hidden Text)

Heat is the transfer of energy in the form of temperature.  It is in Joules.
Temperature is a quantitative measure of the thermal energy of a system.  It is measured in Kelvins.  It is related to the particle's speeds of random motion.
Thermal energy is the kinetic energy of particles moving randomly in a substance. It is measured in Joules.
Internal energy is thermal energy along with chemical energy, nuclear energy, and all other forms of non-macromechanical non-radiant energy.  It is in Joules.

Small thing (Click to Show Hidden Text)

You said heat is the transfer of energy in the form of temperature. I think you meant heat is the transfer of energy because of a difference in temperature.

Your turn!

[Jacobi]

Give three temperature scales than are not Celsius, Fahrenheit, or Kelvin and give conversions between them.

[TheChiScientist]

Rankine= Kelvin X 9/5
Delisle= (373.15-Kelvin) X 3/2
Newton= (Kelvin-273.5) X33/100
Converting Kelvin to these units.

[UTF-8 U+6211 U+662F]

Rankine= Kelvin X 9/5
Delisle= (373.15-Kelvin) X 3/2
Newton= (Kelvin-273.5) X33/100
Converting Kelvin to these units.

I wouldn't use the Newton scale because even though it has lots of historical importance, it's vague and inconsistent when compared to modern temperature scales. You can't convert temperatures reliably or simply from something like Kelvin to the Newton scale. I would use something like the Réaumur scale (which was widely used in Russia).

[JoeyC]

You have to know all of them, so why not?

[UTF-8 U+6211 U+662F]

You have to know all of them, so why not?

It's not that the Newton scale isn't historically important and shouldn't be included in your notes; it's that there are many different ways of converting Newton's measurements to modern temperature scales.

[Jacobi]

Rankine= Kelvin X 9/5
Delisle= (373.15-Kelvin) X 3/2
Newton= (Kelvin-273.5) X33/100
Converting Kelvin to these units.

You're good to go!