unit 7 review game board
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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
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
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 (MM = 55.8 g/mol)
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 (MM = 27.0). 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 (MW = 197) was heated from 0°C to 20°C. It absorbed 1108 J of
energy. What is the molar heat capacity of iron?
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?
-110590 J/mol
Or
-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.
-134036 J/mol
Or
-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
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