Ch6 + Ch 9 Section 10

Question 1

Potential energy

Answer 1

Energy of position

Question 2

1st law of thermodynamics

Answer 2

Delta E of system = Delta E surroundings

Question 3

State function

Answer 3

Pressure. Temp. Volume. Comp. enthalpy.

Question 4

Path functions

Answer 4

Matters how/ path taken.

Work. Internal energy.

Question 5

Specific heat capacity

Answer 5

q/(delta T • Mass) —- (J/C•g)

q/(delta T • mols) —- (J/C•mols)

Question 6

Heat capacity of object

Answer 6

q/ delta T —- (J/C)

Question 7

To find Heat

Answer 7

mCs(delta T) - mols or grams.

Kelvin and Celsius are interchangeable. Equal each other in this equation. No converting.

Question 8

Calorimetry

Answer 8

Sum of all heats (q’s) is zero

Isolates system so no heat goes to surroundings

Question 9

Changes in enthalpy ( temperature change)

Answer 9

mCs(Delta T)

Question 10

Changes in enthalpy (phase change)

Answer 10

Solid to liquid = heat melting

Liquid to gas = heat vaporization

Question 11

Changes in enthalpy ( reactions)

Delta Hr from Delta Hf

Answer 11

Using heat formations = Hproducts - Hreactants

Question 12

Bond enthalpies

Answer 12

Delta Hr = (Sum of B.E reactants) - ( Sum of B.E products)

Bonds broken) - (bonds formed

Question 13

Kinetic energy

Answer 13

Energy of motion

Question 14

Calorimetry at constant volume

Answer 14

Heat rxn = - heat of calorimeter

Heat of calorimeter is = (Ccal • Delta T)

Question 15

Work =

Answer 15

-PdeltaV or -delta(n)RT