Chapter 6: Chemical reaction: energy, rates, and equilibuim

Question 1

biomolecules react with

Answer 1

oxygen to produce co2 and h2o

going from a high potential energy to a low

Question 2

1 cal=

Answer 2

hear energy required to raise the temp. of 1 gram of water by 1 c

Question 3

Keq=

Answer 3

equilibrium constant

Question 4

constants in an equilibrium equation

Answer 4

solids and liquids

Question 5

homogeneous

Answer 5

same (g=g+g)

Question 6

Heterogeneous

Answer 6

different (s=aq+aq)

Question 7

p=

Answer 7

nRT/(V)

Question 8

pressure and volume are BLANK related

Answer 8

Inversely

Question 9

The first law of thermodynamic

Answer 9

-energy can be neither created nor destroyed; energy is conserved

Question 10

Exothermic characters

Answer 10

Surrounding get warmer
reactants have higher potential energy than products
(-) sign
making a bond

Question 11

Endothermic characters

Answer 11

surrounding gets cooler
reactants have lower potential energy than the products
(+) sign
breaking a bond

Question 12

higher bond energies=

Answer 12

stronger bond with lower potential energies

Question 13

weaker bonds=

Answer 13

more ractive

Question 14

types of biomolcules

Answer 14

carbohydrates, proteins, fats

Question 15

Biochemical pathway=

Answer 15

the sequence of reactions leading to a particular product

catabolic, Anabolic

Question 16

Catabolic Pathways

Answer 16

convert large molecules into smaller ones
break down biomolecules from diet
release energy in special energy ( ATP)

Question 17

Anabolic pathways

Answer 17

build larger molecules from smaller ones
build proteins, lipids, and DNA
use energy from catabolism

Question 18

Activation energy

Answer 18

Amount of energy that must be attained by reactants for a chemical reaction to occur.

Question 19

larger activation energy =

Answer 19

bigger hill and slower reaction

Question 20

heat energy causes

Answer 20

particles to move faster and have higher kinetic energy

Question 21

Biological catalysts are called

Answer 21

Enzymes

Question 22

Keq> 1

Answer 22

products favored

Question 23

Keq <1

Answer 23

reactant favored

Question 24

Le chatelier’s principle

Answer 24

if a stress is applied to a system at equilibrium, the reaction will ten to shift in a direction to release that stress.