Final Exam Review Section 4

Question 1

Calories

Answer 1

1 Calorie (C) = 1000 calories (c) = 1 Kilocalorie = 4.184 kJ

Question 2

Change in internal energy

Answer 2

delta E = q + W

Question 3

Work EQ

Answer 3

W = -P * (delta V)

Question 4

1 L*atm

Answer 4

101.33 J

Question 5

Pressure volume work

Answer 5

only done if number of moles of gas on left is different than number of moles of gas on right

Question 6

+ Work

Answer 6

Work is being done on the system
Surrounding doing work on system (endo)

Question 7

(-) Work

Answer 7

Work is being done by system
System doing work on surroundings (exo)

Question 8

Enthalpy

Answer 8

change in energy of system under constant pressure

Delta H = q

Question 9

Exothermic process

Answer 9

system releases energy as form of heat

-q

Question 10

Endothermic process

Answer 10

system absorbs energy from heat in surroundings

+q

Question 11

Specific Heat (C)

Answer 11

energy transferred as heat that is required to raise temperature of 1 g of a substance
greater the heat capacity the more energy required to change its heat

Question 12

C water

Answer 12

4.184 J/(g* deg C)

Question 13

Heat formula

Answer 13

q = mC(delta T)

Question 14

q metal + q water = 0

Answer 14

q water = -q metal

Question 15

q rxn + q cal = 0

Answer 15

q cal = - q rxn

Question 16

q Cal

Answer 16

C cal * (delta T)

Question 17

Standard State

Answer 17

Standard enthalpy is 0

Question 18

enthalpy change for reaction formula

Answer 18

sum of products - sum of reactants

Question 19

Dimagenetic

Answer 19

All electrons are spin-paired p

Question 20

paramagnetic

Answer 20

any element with unpaired electrons

Question 21

wave formula

Answer 21

c = lambda * frequency

Question 22

c (speed of light)

Answer 22

2.998 x 10^8 m/s

Question 23

Photon Energy

Answer 23

E = h * (frequency) or E = h * (c/lambda)
J/photon

Question 24

h (planck’s constant)

Answer 24

6.626 x 10^(-34) J * s

Question 25

Bohr Model of atom

Answer 25

a. electrons can only have certain value of energy corresponding to their energy level
b. Electrons move around the nucleus of the atom in a fixed circular pattern without losing energy
c. spacing of energy levels changes with increasing n values

Question 26

Change in Energy Formula

Answer 26

Ef - Ei = -2.179 x 10^(-18) *[(1/nf2) - (1/ni2)]

Question 27

Wavelength momentum

Answer 27

lambda = h/(m*v)
m in kg