Physical Chemistry

Question 1

The system can exchange matter and energy with its surroundings

Answer 1

Open System

Question 2

Only energy can be transferred between the system and surroundings

Answer 2

Closed system

Question 3

Neither matter or energy can be exchanged between a system and its surroundings

Answer 3

Isolated system

Question 4

State Function

Answer 4

Only the start and the end matter

Question 5

Path Function

Answer 5

It matters how you get there

Question 6

These are examples of?

• Internal Energy (U)
• Enthalpy (H)
• Entropy (S)

Answer 6

State Functions

Question 7

These are examples of?

• Heat (q)
• Work (w)

Answer 7

Path Functions

Question 8

All parts of system within a thermodynamic equilibrium have the same temperature.

Answer 8

0th Law

Question 9

Which law of Thermodynamics covers conservation of energy?

Answer 9

1st Law

Question 10

Which law says state changes will follow the direction of maximum entropy?

Answer 10

2nd Law

Question 11

Which law says that when approaching 0k, entropy becomes constant, so 0 temperature cannot be reached?

Answer 11

3rd Law

Question 12

Charles’ Law

Answer 12

An increase in heat creates an increase in volume

Specifically for gas

Question 13

A gas that doesn’t interact with anything

Answer 13

Ideal Gas

Question 14

Answer 14

The state equation of an ideal gas in a closed system

Question 15

Answer 15

Ideal gas law

Question 16

Answer 16

Ideal gas law

Question 17

Answer 17

Avogadro’s law

Question 18

A transfer of energy that utilizes or causes uniform motion of atoms in the surroundings

Answer 18

Work

A force F moving a distance x does work equal to Fx

Question 19

A measure of the capacity of a system to do work

Answer 19

Energy

Question 20

The means by which energy is transferred from a hotter body to a cooler one in order to equalize their temperatures

Answer 20

Heat

Question 21

The total of the kinetic energy
due to the motion of molecules and
the potential energy

Answer 21

Internal Energy

Question 22

+q: heat is absorbed by the system

Answer 22

Endothermic

Question 23

-q: heat is given out by the system

Answer 23

Exothermic

Question 24

When a gas is compressed by an external
force the work is?

Answer 24

Positive

Question 25

When a gas expands by pushing against an external force the work is?

Answer 25

Negative

Question 26

Energy cannot be created or destroyed but is just transformed from one form to another

Answer 26

1st Law

Question 27

What is the amount of heat needed to raise the temperature of a certain mass 1 degree Celsius?

Answer 27

Heat Capacity

Question 28

Hess's Law

Answer 28

The heat of a whole reaction is equivalent to the sum of its steps

Question 29

When the internal and external pressures are equal the system is in

Answer 29

Equilibrium

Question 30

# Which process * Are infinitely slow * Are at equilibrium * Do maximum work

Answer 30

Reversible

Question 31

# Which process - Go at finite rate - Are not at equilibrium - Do less than the maximum work

Answer 31

Irreversible

Question 32

The process is?

Answer 32

Spontaneous | (irreversible)

Question 33

The process is?

Answer 33

Reversible

Question 34

The process is?

Answer 34

Not possible

Question 35

Answer 35

Gibbs Function

Question 36

The process is?

Answer 36

Spontaneous | (irreversible)

Question 37

The process is?

Answer 37

Equilibrium

Question 38

The process is?

Answer 38

Not possible

Question 39

This is a graphical representation of?

Answer 39

Activation energy

Question 40

Unfolding of regular secondary protein structure causes:

Answer 40

Large increase in the entropy of the protein

Question 41

What does first law of thermodynamics state?

Answer 41

Energy can neither be destroyed nor created

Question 42

Mass does not enter or leave the system in which type of system?

Answer 42

Closed

Question 43

Boiling water represents a ____ in entropy.

Answer 43

increase

Question 44

This has a ___ in entropy?

Answer 44

Decrease

Question 45

The total entropy of the universe ____ in any spontaneous process.

Answer 45

increases

Question 46

The total entropy of the universe ____ in any spontaneous process.

Answer 46

increases

Question 47

Only those processes are possible in nature which would give an entropy ____ for the system and the surroundings together.

Answer 47

increase

Question 48

The disorderly motion of molecules increases and the entropy of the system increases when:

Answer 48

Heat is added

Question 49

# True or False? The heat capacity of the substance is defined as the amount of heat required to raise a unit mass of the substance through a unit rise in temperature.

Answer 49

True

Question 50

Is the formula for?

Answer 50

Enthalpy

Question 51

In a constant volume process, internal energy change is equal to

Answer 51

heat transferred

Question 52

Heat transferred at constant pressure _____ the enthalpy of a system.

Answer 52

increases

Question 53

A reaction is reversible because:

Answer 53

products are reactive

Question 54

If ∆G° of the reaction A → B is -40kJ/mol under standard conditions then the reaction will be:

Answer 54

Spontaneous

Question 55

A large value of Equilibrium Constant Kc means that at equilibrium:

Answer 55

less reactants and more products

Question 56

pKa determines the strength of

Answer 56

an acid

Question 57

In an exothermic reversible reaction increase in temperature shifts the equilibrium to:

Answer 57

reactant side

Question 58

Solubility of Ca(OH)2 is exothermic. Solubility will increase at a ____ temperature.

Answer 58

low

Question 59

The solution having zero pH will be:

Answer 59

highly acidic

Question 60

Answer 60

Decreasing temperature

Question 61

What order reaction is this?

Answer 61

Zeroth

Question 62

What order reaction is this?

Answer 62

First

Question 63

What order reaction is this?

Answer 63

Second

Question 64

Change in the concentration of any one of the reactants or products per unit time is

Answer 64

rate of reaction

Question 65

______ does not affect the rate of a reaction.

Answer 65

ΔH

Question 66

The role of a catalyst is to change the ____________

Answer 66

Activation Energy

Question 67

ΔH < 0

Answer 67

Exothermic

Question 68

ΔH > 0

Answer 68

Endothermic