Thermo

Question 1

What is delta H?

Answer 1

Enthalpy or heat

Question 2

How do you calculate enthalpy (delta H)?

Answer 2

DeltaH = DeltaE + P DeltaV

Question 3

What is heat capacity?

Answer 3

The amount of heat required to raise the temperature by 1*C (same as calorie)

Question 4

How do you calculate enthalpy (DeltaH) from specific heat?

Answer 4

DeltaH = m Cs DeltaT
Cs = specific heat
(Cs can also be Cp)

Question 5

Do coefficients affect enthalpy (DeltaH)?

Answer 5

Yes

Question 6

How do you determine the Delta__* of a reaction?

DeltaH, DeltaS, and DeltaG

Answer 6

Sum of the product’s Delta__* minus the sum of the reactants Delta__*
(Multiplied by the coefficients)

Question 7

What are the three laws of thermo?

Answer 7

1. Energy of the universe is constant
2. Entropy of the universe increases in spontaneous processes
3. Entropy of a pure crystal at 0K is 0

Question 8

What is DeltaS?

Answer 8

Entropy or chaos/disorder

Question 9

What kind of reactions does the universe favor?

Answer 9

Exothermic. Reactions that increase the entropy of the surrounding universe.

Question 10

How do you determine a Delta__ given the temperature and the other two Delta__’s?

Answer 10

DeltaG = DeltaH - T DeltaS
(Grandma hates tight sweaters)
(At equilibrium just set DeltaG to 0)

Question 11

How do you calculate non standard DeltaG from DeltaG*?

Answer 11

DeltaG = DeltaG*f + RTlnQ
Where Q is the concentration of the products over reactants, to the power of their coefficients.
R = gas constant (8.31)