Unit 7 Review Game Board

1 7 13 19 25 31 37

2 8 14 20 26 32 38

3 9 15 21 27 33 39

4 10 16 22 28 34 40

5 11 17 23 29 35 41

6 12 18 24 30 36 42

What is the heat of fusion in kJ/g of a substance if it takes 65980 J of heat to melt a 55 g sample of

the substance?

1.2 kJ/g

1

A reaction occurs spontaneously when G is:

negative

2

605 K equals how many degrees Celsius?

332 C

3

A measure of the average kinetic energy of the particles in a

sample of matter?Temperature

4

What letter corresponds to the melting of a solid?

b

5

6

In the equation, q = nCT, what does q stand for?

heat

What is a measure of the disorder in a system?

entropy

7

What is the formula that defines the change in Gibbs energy?

G = H – TS

Greaction= Gproducts - Greactants

8

The study of all energy changes is called

Thermodynamics

9

10

In the equation, q=nCT, what does C stand for?

Molar heat capacity

11

According to ____________________, the overall enthalpy change in a

reaction is equal to the sum of the enthalpy changes of individual

steps.

Hess’s Law

A positive S means the process was ____________.

More disorderly

12

Entropy plays a larger role in determining the Gibbs energy of

reactions that take place at _____________ temperatures.

Higher

13

This is the energy of a system at constant pressure.

Enthalpy

14

15

In the Gibb’s energy equation, ___________ is the symbol for

entropy.

S

The standard enthalpy of formation of a(n) ____________

is equal to zero.

element

16

17

In the expression q = nCT, what does n represent?

moles

A negative G means the process was ____________.

spontaneous

18

The term ____________________ refers to the amount of energy as heat required to raise the temperature of 1 mole of a substance by 1 K.

Molar heat capacity

19

A negative H means the process was ____________.

exothermic

20

A device used to measure the heat absorbed or released in a chemical or physical change

calorimeter

21

This equation is used to calculate heat.

q=nCT

q=mcpT

q=mL

22

What letter represents the range where the liquid is being warmed?

c

23

24

In the Gibb’s energy equation, __________ is the symbol for

enthalpy.

H

What is 52 Joules in calories?

12.4 calories

25

A 58.2 g sample was heated from 300 K to 350 K. It

absorbed 1523 J of energy. What is the specific heat of

iron?

0.53 J/gK

26

The total entropy of the products in a reaction is 732 J/K, and the total entropy of the reactants is

524 J/K. What is S for the reaction?

208 J/K

27

452 ºF to ºC

233 C

28

How much energy as heat does an iron sample gain if its molar

heat capacity is 25.1 J/K mol, its mass is 33.01 g, and it is heated

from 15.0°C to 42.0°C?

400.9 J

29

If 1484 J of energy as heat is released from a 800 g block of aluminum. What temperature

change occurred if the molar heat capacity of aluminum is 24.2

J/K.mol?

2.07 K

30

What is the boiling point of the substance (number)?

450 K

31

A 426.3 g sample of gold was heated from 0°C to 20°C. It

absorbed 1108 J of energy. What is the molar heat capacity of

gold?

25.6 J/mol.°C

32

341 K equals how many degrees Fahrenheit?

154 C

33

What is the value of G at 330 K for a reaction in which H = –103 kJ/mol and S = +23.00 J/mol K?

-110.59 kJ/mol

34

35

For a process in which H is –98 kJ and S is 132 J/K, calculate the

change in the free energy at 0°C.

-134 kJ/mol

36

When calculating the change in enthalpy of a reaction, this is

the equation that is used.

H reaction = H products - H reactants

Water has a specific heat of 4.18 J/gK. What is its molar heat

capacity?

75.24 J/molK

37

How much heat would be needed to evaporate 100 g of water if the heat of vaporization of water is

2.26 kJ/g?

226 kJ

38

How much energy as heat does a 9 mol titanium sample gain if its

molar heat capacity is 27.8 J/K mol and it is heated from

15°C to 55.0°C?

10008 J

39

What is the standard thermodynamic temperature?

25 C (or 298 K)

40

The English measurement for measuring energy is the

___________

calorie

41

What is the melting point of this substance?

300 K

42

A B