Report

Systeme International base units (SI Units) • • • • • • Length Meter Mass gram Volume Liter Time Second Temperature Kelvin Heat Joule m g L s K J Written giga mega kilo Symbol G M k Exponential 109 106 103 deci Base unit d 100 10-1 centi c 10-2 milli micro Nano m µ N 10-3 10-6 10-9 Decimal 1 000 000 000 1 000 000 1 000 1 0.1 0.01 0.001 0.000 001 .000 000 001 • Heat - measure of the quantity or how much energy • Temperature - measure of the intensity or how energetic each particle is Temperature Conversion K = °C + 273 °C = 5/9 (°F – 32) °F = 9/5 * °C + 32 Density - The amount of mass per unit volume Density = Mass Volume D=M V Specific Gravity • Numerically the same as density but has no units. It is still a mass/volume • It is a comparision to water as the standard that has a density of 1.00 g/mL at 20 ºC • If Lead has a density at 20 ºC of 11.35 g/mL It is 11.35 times more dense than water • So the specific gravity for Lead is reported as 11.35 calorie The amount of heat needed to raise the temperature of one gram of liquid water by 1 ºC 1 kcal = 1000 cal 1cal = 4.184 J 1000 cal = 1 C (food calories) Specific heat • The amount of heat (in calories) necessary to raise the temperature of 1 g of any substance by 1 ºC. Amount of heat = Specific heat x mass x change in temp Heat = SH x m x (T2 – T1)