Download presentation
Presentation is loading. Please wait.
1
Matter-has mass and occupies space
Properties: Chemical-exhibited by matter as it undergoes changes in composition Physical-exhibited by matter without a change in composition. Extensive-depends on the amount of matter Intensive-independent of the amount of matter Physical & Intensive:
2
Chemical Change-one or more substances are either used up
or formed and energy is absorbed or released. Physical Change-change in physical properties without a change in composition. Energy-capacity to do work or transfer heat. Kinetic Energy (KE)-motion Potential Energy (PE)-position, condition or composition. Release of Energy Exothermic Absorption of Energy- Endothermic
3
E=mc2 Law of Conservation of Matter-There is no
observable change in the quantity of matter during a chemical reaction or during a physical Change. Law of Conservation of Energy-Energy cannot be created or destroyed in a chemical reaction or in a physical change. It can only be converted from one form to another. E=mc2 Combined-The combined amount of matter and energy in the universe is fixed. 2Mg + O2-----> 2MgO
4
Chemical Changes P4(s)+6Cl2(g)----->4PCl3(l)
5
Physical Change Chemical Change H2 O2 H2O
6
8C 10H 2O 4N Law of Definite Proportions-Different samples of any pure compound contain the same elements in the same proportions by mass
7
Separation of Mixtures
8
SI=International System of Units
Temperature = K (Kelvin) Time = s (seconds) Energy = J (Joule)
9
% Composition Parts of A (by mass) 100 parts mixture (by mass)
%A (mass)= Mass A Mass mixture 49.5 grams of Carbon 100 grams of caffeine 8C 10H 2O 4N 49.5% C 5.15% H 16.5% O 28.9% N
10
Density mass (g) volume (ml) (density)= Specific Gravity (substance)
(water) =Sp. Gr.= (water)= oC
11
K=oC
12
Heat Transfer (Amount of heat in J) Specific Heat =
(mass of substance in g)(Temperature change in K/oC) Specific Heat = Heat Capacity= (Csp)(mass) units=(J/ oC)
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.