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Chap 1

initial periodic an energy

QuestionAnswer
How did Mendeleev arrange elements compared to today Men-by atomic weight; today by atomic number
What does chemical energy do for nature? Nitrogen, Oxygen, Carbon, and water cycles
When a chem. rxn is broken down, what kind of rxn is it? Exothermic rxn, energy released
2 main categories of energy Kinetic (energy of motion; Potential , stored energy
Formula for calculating KE KE= 1/2mXvsquared KE is proportional to mass
What is Energy Transformation? energy that is transformed from one form to another
What kind of rxn (endo or exo) results from a smaller molecule is made into a larger molecule? energy is needed so it's an endothermic rxn
What is Chemical Energy Potential energy stored in chemicals
What happens when a gas is burned? What type of energy is released? potential energy is released
What is geothermal Energy? renewable energy; Heat is the transfer of thermal energy from one object or system to another
Thermal Energy energy possessed by an object or system due to movement of particles within the object or system
Is thermal energy a form of potential or kinetic energy? kinetic
How does kinetic energy exist? KE exists if it's released from some form of stored energy (PE)
Work movement of an object by some force
5 types of energy heat motion light chemical sound
How does the sun create energy? nuclear fusion: it requires high temperature so small H nuclei are fused to create He
How does nuclear fission work? Neutrons are shot into uranium nucei to produce fission product and neutrons that continue the chain reaction
2 kinds of nuclear rxn nuclear fission and nuclear fusion
Nuclear Energy Energy created from nuclear reactions
What's a battery? How is it measured? positive and negative terminal that create an electric potential (ability to move a charge); Volts
Current movement of a charges particle through a wire
Electric Field area surrounding a charges particle, direction always points in the direction a + positive particle would move within the field
Electrical Energy energy stored in charged particles within an electrical field
How does chemical energy get released from molecules? bonds are broken PE is released as KE and heat (non reusable energy)
Hot Mama Looks Calm, Seriously! Heat Motion Light Chemical Sound 5 kinds of energy
Created by: roisinmac19