Temperature Conversions By Jenn Faust Liz Clay. What is temperature? Most people think of temperature as being hot or cold Most people think of temperature.

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Presentation transcript:

Temperature Conversions By Jenn Faust Liz Clay

What is temperature? Most people think of temperature as being hot or cold Most people think of temperature as being hot or cold It is actually the average speed of air molecules It is actually the average speed of air molecules Temperature is measured by a thermometer Temperature is measured by a thermometer

Types of Temperature Scales Fahrenheit is the most common measure we use in the U.S. Fahrenheit is the most common measure we use in the U.S. Celsius is the metric standard Celsius is the metric standard Kelvin is used in the scientific world Kelvin is used in the scientific world

Fahrenheit to Celsius To go from degrees Fahrenheit to degrees To go from degrees Fahrenheit to degrees Celsius, use the formula ºCelsius = (ºFahrenheit - 32) x 5/9

Celsius to Fahrenheit To convert degrees Celsius to degrees Fahrenheit, use this formula: To convert degrees Celsius to degrees Fahrenheit, use this formula: ºFahrenheit = (ºCelsius x 9/5) + 32

Celsius to Kelvin In order to convert to Kelvin, the temperature must first be in degrees Celsius. In order to convert to Kelvin, the temperature must first be in degrees Celsius. If the temperature is in degrees Fahrenheit, convert it to degrees Celsius. If the temperature is in degrees Fahrenheit, convert it to degrees Celsius. Next use the formula: Next use the formula: ºCelsius = Kelvin Kelvin does NOT use the degrees symbol, only K units

Remember… Always use significant figures in temperature conversions!!!

Example for Fahrenheit to Celsius A pot of water is 92° Fahrenheit. What is the temperature in Celsius? Use the formula (ºFahrenheit - 32) x 5/9 = ºCelsius Substitute the 92°F in for ºFahrenheit (92°F- 32) x 5/9 = ºCelsius 60 x 5/9 = ºCelsius) 33 = ºCelsius The pot of water is 33 ºC.

Example for Celsius to Kelvin It is 23°C in a room, what is the temperature in Kelvin? Use the formula ºCelsius = Kelvin Use 23°C for °Celsius 23ºC = Kelvin 300 = Kelvin The temperature is 300 K.

Example for Fahrenheit to Kelvin If the temperature of a human body is 98.6 º F, what is the temperature in Kelvin? Since it is impossible to go directly from Fahrenheit to Kelvin, convert 98.6 ºF to ºCelsius using the formula Since it is impossible to go directly from Fahrenheit to Kelvin, convert 98.6 ºF to ºCelsius using the formula ºCelsius = (ºFahrenheit - 32) x 5/9 ºCelsius = (98.6ºF - 32) x 5/9 ºCelsius = 66.6 x 5/ = º Celsius (continued)

Continued Next, convert Celsius to Kelvin, using the formula Next, convert Celsius to Kelvin, using the formula ºCelsius = Kelvin 37.0ºC = Kelvin 310 = Kelvin The human body is 310 K.

Quiz Time! It is 22ºC in a room. What is the temperature in Fahrenheit? a ºF a ºF b ºF b ºF c. 295 ºF c. 295 ºF d ºF d ºF

Oops… Try Again! Remember Remember ºFahrenheit = (ºCelsius x 9/5) + 32 ºFahrenheit = (ºCelsius x 9/5) + 32 Use algebra correctly Use algebra correctly Remember significant figures! Remember significant figures! Go Back Go Back

Good Job! You used the correct formula You used the correct formula ºFahrenheit = (ºCelsius x 9/5) + 32 Now try another problem…

Question 2 The temperature of a pot of water is 89ºC. What is the temperature in Kelvin? a. 362 K a. 362 K b K b K c. 121 K c. 121 K d. 203 K d. 203 K

Oops… Try Again! Remember Remember To go from Celsius to Kelvin, add 273 To go from Celsius to Kelvin, add 273 Be careful with your algebra! Be careful with your algebra! Go Back Go Back

Good Job! You used the correct formula You used the correct formula ºCelsius = Kelvin Now try one more problem…

Question 3 A system has a temperature of 43ºF. What is the temperature of the system in Kelvin? A system has a temperature of 43ºF. What is the temperature of the system in Kelvin? a. 316 K a. 316 K b. 210 K b. 210 K c. 92 K c. 92 K d. 280 K d. 280 K

Oops… Try Again! Remember to first convert Fahrenheit temperatures to Celsius Remember to first convert Fahrenheit temperatures to Celsius ºCelsius = (ºFahrenheit - 32) x 5/9 Next, convert the Celsius temperature to Kelvin Next, convert the Celsius temperature to Kelvin ºCelsius = Kelvin Remember significant figures! Remember significant figures! Go Back Go Back

Good Job! You’re finished!!!