Thermal Concepts in Physics

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the absolute zero temperature in Celsius?

  • -100
  • 0
  • -32
  • -273.15 (correct)

Which thermometric property changes with temperature?

  • 0.5
  • 1000
  • 76 (correct)
  • 2

At what temperature does the triple point of water occur on the Kelvin scale?

  • 373.15
  • 273.15
  • 273.16 (correct)
  • 0

What is the pressure at the ice point temperature?

<p>760 (D)</p> Signup and view all the answers

How much is the temperature in Celsius when it is 212°F?

<p>100 (C)</p> Signup and view all the answers

What is the fundamental interval on the Kelvin scale?

<p>100 (D)</p> Signup and view all the answers

What does the equation $T_K = T_C + 273.15$ represent?

<p>0 (A)</p> Signup and view all the answers

What temperature corresponds to 100°C in Kelvin?

<p>373.15 (C)</p> Signup and view all the answers

What does heat transfer require between two objects?

<p>Thermal contact (D)</p> Signup and view all the answers

According to the Zeroth Law of thermodynamics, what conclusion can be drawn if objects A and C are in thermal equilibrium and objects B and C are also in thermal equilibrium?

<p>Objects A and B are in thermal equilibrium (C)</p> Signup and view all the answers

What is thermal equilibrium?

<p>When two objects cease to exchange energy by heat (B)</p> Signup and view all the answers

What common misunderstanding about temperature can arise from touching objects of different thermal conductivities?

<p>They feel cold because they are at different temperatures (A)</p> Signup and view all the answers

Which of the following statements is NOT true regarding thermometers?

<p>They can use any physical property for measurements (A)</p> Signup and view all the answers

Which temperature scale is considered a thermodynamic scale?

<p>Kelvin (D)</p> Signup and view all the answers

What is the primary factor that thermometers rely on for measuring temperature?

<p>Change in physical properties with temperature (B)</p> Signup and view all the answers

Which of the following is a reason why our senses may provide a misleading indication of temperature?

<p>Different materials conduct heat differently (B)</p> Signup and view all the answers

Flashcards are hidden until you start studying

Study Notes

Heat

  • Heat is the transfer of energy between objects due to a temperature difference.
  • Thermal contact is required for heat transfer.
  • Heat always flows from a warmer object to a colder object.

Zeroth Law of Thermodynamics

  • Two objects in thermal equilibrium with a third object are also in thermal equilibrium with each other.
  • This law allows for the development of thermometers.
  • Provides a basis for comparing temperatures.

Thermal Equilibrium

  • Objects in thermal equilibrium do not exchange energy through heat or electromagnetic radiation.
  • This occurs when objects in thermal contact cease to exchange energy.

Thermal Conductivity

  • The rate at which heat flows through a material.
  • Higher conductivity materials, such as metal, transfer heat more readily than lower conductivity materials, like plastic.
  • Can create misleading perceptions about the true temperature of an object.

Thermometers

  • Devices used to measure the temperature of a system.
  • Temperature measurements depend on the measuring device and the temperature scale used.

Thermodynamic (Kelvin) Scale

  • Ice point (273.15 K): The temperature at which water freezes.
  • Triple point of water (273.16 K): Temperature at which water exists as solid, liquid, and gas in equilibrium.
  • Steam point (373.15 K): The temperature at which water boils.
  • Absolute zero (0 K): The theoretical temperature at which all molecular motion ceases.

Celsius Scale

  • Ice point (0 °C): The temperature at which water freezes.
  • Steam point (100 °C): The temperature at which water boils.
  • Relationship to Kelvin: TK = TC + 273.15 or TC = TK - 273.15

Fahrenheit Scale

  • Ice point (32 °F): The temperature at which water freezes.
  • Steam point (212 °F): The temperature at which water boils.
  • Relationship to Celsius: TF = 9/5 TC + 32 or TC = 5/9 (TF - 32).

Thermometric Properties

  • Physical properties that change with temperature.
  • Used in thermometers to measure temperature.
  • Examples include:
    • Volume/length of a liquid
    • Length of a solid
    • Pressure of a gas at constant volume
    • Volume of a gas at constant pressure
    • Electric resistance of a conductor
    • The colour of an object
    • The emf of a thermocouple

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

More Like This

Thermodynamics Concepts
12 questions
Thermodynamics Quiz
40 questions

Thermodynamics Quiz

SeasonedTurquoise3230 avatar
SeasonedTurquoise3230
Use Quizgecko on...
Browser
Browser