Temperature

Section1

Temperature Scales

Fahrenheit ( ◦F ) Celsius (◦C ) Kelvin ( K )

What temperature really is Atoms are in constant

motion, even in a solid object.

The back-and-forth jiggling of atoms is caused by thermal energy, which is a kind of kinetic energy.

Terms to Learn

Temperature: is a measure of the average kinetic energy of the particles in an object

Thermal expansion: is the increase in volume of a substance due to an increase in temperature.

Absolute zero: the lowest temperature on the Kelvin Scale

Converting to Kelvin The Kelvin temperature

scale is useful in science because it starts at absolute zero.

To convert from Celsius to Kelvin, you add 273 to the temperature in Celsius.

Is the official SI temperature scale

Absolute zero Absolute zero is -273°C. You cannot have a temperature lower than

absolute zero. Think of absolute zero as the temperature at

which atoms are “frozen.”

Fahrenheit

Measured in degrees

Water boils at…..

Water freezes at…..

Celsius

Measured in degrees Scale is divided into 100 equal parts between

the freezing point and the boiling point Water boils at….. Water freezes at …..

Temperature Conversions

Celsius to Fahrenheit °F = (9/5 C) + 32

Fahrenheit to Celsius

C = 5/9 (°F – 32)

A friend in Paris sends you a recipe for a cake. The French recipe says to bake the cake at a temperature of 200 °C for 45 minutes.

At what temperature should you set your oven, which uses the Fahrenheit scale?

Solving Problems

1. Looking for: …temperature in degrees Fahrenheit

2. Given: …temperature 200 C

3. Relationships: °F = (9/5 C) + 32

4. Solution °F = (9/5(200 °C) + 32 = 392 °F

Solving Problems