5 Steps to a 5 AP Chemistry

Temperature

The base unit for temperature in the SI system is kelvin(K).

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

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

Celsius to kelvin: K =°C +273.15

Pressure

The unit for pressure in the SI system is the pascal(Pa).

1 millimeter of mercury (mm Hg) =1 torr

1 Pa =1 N/m^2 =1 kg/m s^2

1 atm =1.01325 × 10 sPa =760 torr

1 bar = 1 × 105 Pa

Energy

The unit for energy in the SI system is the joule(J).

1 J =1 kg m^2 /s^2 =1 coulomb volt

1 calorie (cal) =4.184 joules (J)

1 food Calorie (Cal) =1 kilocalorie (kcal) =4184 joules (J)

1 British thermal unit (BTU) =252 calories (cal) =1053 joules (J)

348  SI Units