unit 7 review game board 171319253137 281420263238 391521273339 4101622283440 5111723293541...
TRANSCRIPT
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
What is the formula that defines the change in Gibbs energy?
G = H – TS
Greaction= Gproducts - Greactants
8
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
Entropy plays a larger role in determining the Gibbs energy of
reactions that take place at _____________ temperatures.
Higher
13
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 device used to measure the heat absorbed or released in a chemical or physical change
calorimeter
21
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
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
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
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
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