1. Explain what is meant when a reactant is in excess.
A. The reactant that is left over when the reaction stops
B. The reactant that insures all of the other reactant is used up completely
C. The reactant that does not limit the amount of product produced
D. All of the above

2. Given a reaction where 4.23g of Magnesium Hydroxide solution is mixed with 3.33g of Phosphoric Acid solution, Calculate the maximum mass of magnesium phosphate that could be produced: 3Mg(OH)2 + 2H3PO3 --> Mg3(PO4)2 + 6H2O

A.10.9g
B.6.4g
C.4.5g
D.2.1

3. From the question above, which reactant is the Limiting reactant?
Mg(OH)2
H3PO4
Mg3(PO4)2
H2O
4. Using the information from the questions above, how much mass of excess reactant is left over?

3.44g
2.96g
1.27g
0.37g

5. Determine the maximum or theoretical mass of water that can be produced at STP when 1.43L of Propanol gas is reacted with 2.34g of oxygen gas: 2C3H7OH(g) + 9O2(g) --> 6CO2(g) + 8H2O(l)

17.5g
5.77g
4.60g
1.17g

6. The study of energy changes during chemical reactions is called

Heat capacity
Thermochemistry
Thermodynamics
Endothermic

7. Which following liquid substance would be an excellent coolant when the turbines of a nuclear power plant get hot?

Liquid "X" C = 1.24 J/g-C
Liquid "Y" C = 0.75 J/g-C
Liquid "Z" C = 3.53 J/g-C
None of the above: Not enough information

8. 5.00g of solid NaOH is added to 150.mL of water with an initial temperature of 22.5°C. After stirring, the NaOH dissolves completely into the water and the water/solution temperature is now 27.6°C. This reaction of NaOH dissolving is considered an

Endothermic reaction
Exothermic reaction
External reaction
Endoplasmic reaction

9. When placing an ice cube in your hand, energy is transferred from the hand to the ice cube. This energy transfer is called

Heat
Specific heat capacity
Heat capacity
temperature

10. Two substances are placed together and energy is transferred. Substance A has an initial temperature of 35.6C. Substance B has an initial temperature of 22.5C. In which direction will the energy flow?

Energy will flow from substance A to substance B
Energy will flow from substance B to substance A
There will not be any energy transfer, the system is at homeostasis
Not enough information given: the type of substance is needed

11. Which of the following symbols is used to represent heat?

q
Cp
m
E

12. Which of the following is the equation used to calculate heat transferred due to a temperature change (difference)?

q = m •C • ΔT
q = m •C • T
C = m/(q• ΔT )
d. C = q • ΔT

13. The amount of energy it takes to raise 1.0g of substance, 1.0°C is called,

Heat capacity
Specific heat capacity
Thermodynamics
Exothermic

14. During a chemical reaction, the surroundings get cooler. This would indicate that the reaction is a(n)

Endothermic reaction
Exothermic reaction
Cryogenic reaction
Slow reaction

15. Chemical potential energy would be considered

Energy located in the nucleus of atoms
Energy that is available in the Universe, but not tapped into yet.
Energy stored in the bonds of a substance C – H bonds contain a certain amount of stored energy
Energy that is released into the surroundings