Thermal conductivity
This presentation is the property of its rightful owner.
Sponsored Links
1 / 9

Thermal conductivity PowerPoint PPT Presentation


  • 238 Views
  • Uploaded on
  • Presentation posted in: General

Thermal conductivity. Aim To be able to compare the thermal conductivities of a range of materials. Conduction. Hot. Cold. Direction of heat transfer.

Download Presentation

Thermal conductivity

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Thermal conductivity

Thermal conductivity

Aim

To be able to compare the thermal

conductivities of a range of materials.


Thermal conductivity

Conduction

Hot

Cold

Direction of heat transfer

Heat energy can be transferred by conduction. When materials are heated, the atoms vibrate more. This kinetic energy can be passed from atom to atom in conducting materials. Conduction happens in all materials, but in good conductors like metals, free electrons can transfer the heat energy more quickly. All metals are good conductors of heat. Insulators do not have free electrons and conduct heat poorly. Explain why metals always feel cold to the touch, whereas wood for example feels warm ?

Conduction:


Thermal conductivity

Equipment

Materials, petroleum jelly, drawing pins, stop clock, safety glasses, tripod, heat mat, Bunsen burner

Diagram


Thermal conductivity

Method

  • Attach drawing pin, a measured distance from end of first material using petroleum jelly.

  • Place the material on a tripod

  • Heat the other end using a bunsen.

  • Time until petroleum jelly melts, and pin drops off.

  • Repeat twice with same material (cool it first)

  • Repeat with other materials


Thermal conductivity

Risk Assessment

Risk:

Hazard:

Control Measure:


Thermal conductivity

Results


Thermal conductivity

Analysis

Conductivity is…


Thermal conductivity

Evaluation

My experiment went…

I did not have problems with… because…

I had problems with … because…

To improve my experiment I could…

My results would be more reliable if I…

I liked this experiment because…

I disliked this experiment because…


  • Login