AP Chem: Unit 6

Question 1

What is the equation for heat?

Answer 1

q=mc(change in)T

Question 2

What are some qualities of an endothermic reaction?

Answer 2

Energy enters the rxn, Heat enters the system, delta H is (+).

Question 3

What are some qualities of an exothermic reaction?

Answer 3

Energy exits the rxn, Heats leaves the system, delta H is (-)

Question 4

In the Enthalpy of a reaction, we must multiply by what?

Answer 4

Multiply by the # of moles of each substance.

Question 5

What formula is used to calculate the overall reaction of energy for delta H?

Answer 5

Products - reactants

Question 6

In Hess’s law, what happens when you flip a reaction?

Answer 6

The sign for enthalpy changes

Question 7

In Hess’s law, what do you have to do when you add multiple reactions together?

Answer 7

You will have to add their enthalpies as well

Question 8

How do you go from J to KJ?

Answer 8

Divide by 1000

Question 9

How do you determine the formal charge of an atom?

Answer 9

of valence electrons - # of lone pairs - # of bonded electrons

Question 10

How do you find the HEAT of a reaction that starts out in grams?

Answer 10

Go from grams to Mm; (x) it by the energy of the last rxn if necessary.