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10 Cards in this Set
- Front
- Back
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What happens in all chemical changes? |
Matter absorbs or releases energy |
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What is the conservation of energy? |
Energy can't be created or destroyed, only transformed from one form to another |
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Combination reaction? |
A + B = AB (elements/compounds) |
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Decomposition reaction? |
AB = A + B (compound = compounds/elements) |
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Single displacement reaction? |
A + BC = B + AC When A is a metal and more reactive than C A + BC = C + VA When A is a halogen and more reactive than C |
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Double displacement reaction? |
AB + CD = AD + CB (positive and negative groups) |
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Neutralization of acid bases? |
H+ + OH- = H2O + Heat |
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Heat in chemical reactions |
Energy changes always accompany chemical reactions. One reason reactions occur is that the products attain a lower, more stable energy state than the reactants |
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Exothermic reactions |
Release heat |
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Activation energy |
The amount of energy that must be supplied to start a chemical reaction |
