Friday, November 12, 2010

#23 on Exam Review Packet

Explain the difference between Celsius and Kelvin temperature scales. Give examples of the conversions, and explain how you would know whether a given temperature could exist or not.

The Celsius temperature scale is based off of the freezing point of water (0*). Kelvin is based off of absolute zero, or the lowest temperature that is attainable. To convert from Celsius to Kelvin, you add 273.15. Kelvin does not use a degree sign.

Freezing Point of Water: 0*C or 273.15
Boiling Point of Water: 100*C or 373.15

It is easy to tell wether or not a temperature can exist. If it falls below 0 on the Kelvin scale, it can not be possible! This is because 0 is the lowest temperature attainable. So if it falls below -273.15*C, it doesn't exist!


  1. Kianna you did an absolutely awesome job on this post! Having the question at the beginning always helps the reader as a reminder of what the problem is about. I love how you made it clear which temperature scale you were talking about with the bolded words. The only thing I would change would be to find an actual degree sign when you write out the freezing and boiling points of water. That might confuse the reader. One last thing would be the occassional mispelled word such as 'wether' should be 'whether.' Besides that it was really well done. Short, concise, and exceptional! AWESOME

  2. Kianna, excellent descriptions. Your descriptions on what the Celsius and Kelvin scales are based off of were really thorough and concise. I also liked how you included the question you were answering at the top of blog post. One suggestion though would be to include the actual equations: Celsius=K-273.15 and K=Celsius+273.15. Overall, great answer!

  3. Kianna I liked your short and sweet answer but ill just make one suggestion to add on to your answer.
    Kelvin is the temperature scale devised and used to measure temperature from the melting point of ice down to absolute zero. Celsius and Fahrenheit are mainly used to measure temperatures from the melting point of ice and up. Zero Kelvin is equal to −273.15 deg Celsius and -459.67 deg Fahrenheit. The Celsius scale equally divides the temperature range between the melting point of ice and the boiling point of water into 100 equal parts. 0 deg Celsius is equal to 273.15 Kelvins and 32 deg Fahrenheit.