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HS Chem equilibrium
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15
Chemistry
10th Grade
04/25/2013

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Term
What is the expression for equilibrium
Definition
K=[products]^coeff. /[reactants]^coeff.
Term
How do you tell whether the forward or reverse reactant is more successful.
Definition
You calculate the k for forward and the k for reverse which is just the opposite. Which ever one is larger, is more successful.
Term

Ex. 1 Given: A + 2B <> C

 I              10M  8M      0

C               2M   4M     2M

E               8M   4M     2M

 

1. What does the second row do to the reactants? products?

 2. How much is being added or subtracted is determined by what?

 3. If you want to find k what row do you use?

4.What does ICE stand for?

Definition
1. The second row subtracts from the reactants and adds to the products. 2. The amount added or subtracted is determined by moles 3. To find k use the third row or "e" 4. Initially, Change, equillibrium
Term
Forward reactions increase products
and reverse reactions decrease products.
Catalyst has no effect on the amount of products

Volume increasing favors side with more moles while volume decreasing favors side with less moles.

pressure goes up, volume goes down
Definition
Term
A(g)+2B(g)<>C(g)+D(g)+heat

Favors reverse or forward
1. increasing [A]
2. increasing Temp
3. Decreasing [C]
Definition
1. forward
2. reverse
3. forward
Term
A(g)+2B(g)<>C(g)+D(g)+heat

Favors reverse or forward

1. increasing the volume of the container
2. increasing [D]
3. Removing some B
Definition
1. reverse
2.reverse
3.reverse
Term
A(g)+B(g)+heat<>2C(g)+D(g)

increases, decreases, or has no effect on product?

1. Decreasing pressure
2. decreasing temp
3. addition of catalyst
4. decreasing [D]
Definition
1. increase
2. decrease
3. no effect
4. increase
Term
A(g)+B(g)+heat<>2C(g)+D(g)

increases, decreases, or has no effect on product?

1. decreasing [A]
2. increasing [B]
3. Decreasing volume
Definition
1. decrease
2. increase
3. decrease
Term
N2O(g)<>2 NO2(g) dH=14kcal

forward, reverse, or no change

1. Increasing pressure
2. increasing temp
3. increasing volume
Definition
1. reverse
2. forward
3. forward
Term
N2O(g)<>2 NO2(g) dH=14kcal

forward, reverse, or no change

1. Adding NO2
2. Adding a catalyst
3. Removing NO2
Definition
1. reverse
2. no change
3. forward
Term
CH4(g)+2 O2(g)<> CO2(g)+2 H2O(g)+ 100kcal more prods, reactants, or no change 1. [CH4] increase 2. some CO2 and H2O are removed 3. temp decrease 4. pressure increase 5. temp increase
Definition
1. products 2. products 3. products 4. no change 5. reactant
Term
More reactants or products

N2+3 H2 <> 2 NH3+heat
1. remove NH3
2. decrease pressure
3. add N2 gas
4. increase temp
Definition
1. products
2. reactants
3. products
4. reactants
Term
More reactants or products

2 SO2 +O2 <> 2 SO3+ heat
1. increase SO2
2. increase temp
3. remove O2
Definition
1. products
2. reactants
3. reactants
Term
if CO2 were increased what would happen?

CO2+C+heat<> 2 CO
1. temp
2. CO concentration
3. Pressure
4. volume
Definition
1. decrease
2. increase
3. no change
4. no change
Term
H2+Cl2<> 2 HCl +heat

forward, reverse, or no change

1. increase H2
2. increase pressure
3. decrease temp
4. remove HCL
5. decrease volume
Definition
1. Forward
2. no change
3. Forward
4. Forward
5. no change
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