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Chap 1
initial periodic an energy
| Question | Answer |
|---|---|
| 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
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