Chem: 2.6: Other Units- Temperature and Density

Temperature is

a measure of the average amount of energy of motion, or kinetic energy, a system contains

expressed using scales that use units called degrees

°C

=(°F − 32) × 5/9

°F

=(°C − 9/5) × 5/9

K

= °C + 273.15

0K is absolute zero (0 kelvins)

Density

is a physical property that is defined as a substance’s mass divided by its volume (mass/volume)

is usually a measured property of a substance, so its numerical value affects the significant figues in a calculation

has derived units, just like velocity

When we want to use density to convert from mass to volume:

the numerator and denominator of density need to be switched (volume/mass)

How to determine mass using density?

You multiply the given volume by the known density, the volume units will cancel and leave you with mass units.