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Flashcards on Compounds and Formulas and energy changes, created by ashley.amber on 05/30/2013.
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Created by ashley.amber
about 6 years ago
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| Question | Answer |
| what does an exothermic reaction do? | releases heat energy into the surroundings, causing temp to increase |
| what do endothermic reactions do? | absorb thermal energy causing surrounding temp to decrease |
| give examples of an exothermic reaction | combustion, respiration, neutralization of acids with alkalis, reaction of metals with acids. |
| give examples of endothermic reactions | thermal decomposition, photosynthesis, some types of electrolysis |
| what is a compound? | a substance formed when 2 or more atoms chemically bond |
| what are the formulas for: carbon dioxide carbon monoxide water methane | CO2 CO H2O CH4 |
| what is the formula magnesium chloride? | mg(2+) + Cl(-) = MgCl2 |
| what is a synthesis reaction? | when a compound is formed from 2 simpler reactants |
| give the symbol equation for magnesium+oxygen=magnesium oxide | 2Mg(2+) + O2(-)= 2MgO |
| what is a decomposition? | a reaction where a compound breaks down into 2 or more simpler products (usually requires energy- light, electrolysis/heat, thermal decomposition) |