6.6 + 6.7 Flashcards Preview

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Flashcards in 6.6 + 6.7 Deck (20):
1

Law of conservation of mass

matter can't be created or destroyed

2

mole-mole factor

ratio of moles for any two substances in an equation

3

Theoretical yield

max amount of product

4

how is theoretical yield calculated?

calculated with a balanced equation

5

actual yield

amount of product obtained when reaction takes place

6

percent yield

ratio of actual yield to theoretical yield

7

formula for calculating percent yield?

percent yield= (actual yield(g) / theoretical yield(g)) x 100

8

limiting reactant

substance in chemical reaction that is used up first which limits amount of product formed

9

excess reactant

left over from limiting reactant

10

What are the 3 conditions for a chemical reaction to occur?

1. Collision
2. Orientation
3. Energy

11

Collision

reactants collide

12

Orientation

reactants align properly to break/form bonds

13

energy

collision provides energy of activation

14

Activation energy

amount of energy required to break bonds between atoms of the reactants

15

What happens if energy of collision is less than energy of activation?

molecules bounce apart without reacting

16

when collision occurs, are products formed often?

no

17

heat of reaction

amount of heat absorbed/released during reaction

18

how do you find the heat of reaction (formula)

heat of product-heat of reactants

19

exothermic reaction
which has greater energy, reactant or product?
heat reaction value

energy of reactant greater than energy of product
heat reaction value is negative (-)

20

endothermic reaction

energy of reactant lower than energy of product
heat reaction value is positive (+)