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WorksheetsChemistry Final Review 2021
Total questions: 19
Worksheet time: 10mins
Water and methane molecules are roughly the same size and the same mass but water boils at a much higher temperature. What can we conclude about the intermolecular forces between water and methane?
water has stronger intermolecular forces than methane
water has weaker intermolecular forces than methane
methane has stronger intermolecular forces than water
methane and water have similar intermolecular forces
The diagram provided here shows the reactants and the products of a common chemical reaction. The line on the graph behind them represents the energy of the system as the reaction progresses. Which of the following conclusions is best supported by the information provided?
This is a fast reaction.
This is a slow reaction.
This reaction is endothermic.
This reaction is exothermic.
Bond breaking releases energy.
true
false
If a reaction is endothermic
the energy required to break bonds is less than the energy released when new bonds are formed.
the energy required to break bonds is more than the energy released when new bonds are formed.
the energy required to form bonds is less than the energy released when bonds are broken.
the energy required to form bonds is more than the energy released when bonds are broken.
What must be true for a reaction to occur? (Choose all that apply)
products must collide with sufficient energy for a reaction
reactants must collide with sufficient energy for a reaction
products must have the correct orientation for a reaction
reactants must collide with the correct orientation for a reaction
You can speed up a reaction by... (choose all that apply)
adding an inhibitor
adding a catalyst
cooling the reaction
heating the reaction
increasing the surface area
Reactions tend to speed up over time.
true
false
The slope of a reaction rate versus temperature graph is positive.
true
false
Le Chatelier's Principle states that a reaction will shift
(reactant <=> product)
away from a reactant or product that is added
toward a reactant or product that is added
away from an increase in pressure
toward added heat
For the reaction A + B <=> C + D, what will result in the formation of more reactants?
Adding A + B
Removing C + D
Removing A + D
Adding C + D
For the reaction heat + A + B <=> C + D, what will result in the formation of more reactants?
increasing the temperature
increasing the pressure
decreasing the temperature
adding A + B
For the reaction N2(g) + 3H2(g) <=> 2NH3(g) + heat, which change(s) would result in the formation of more NH3?
reduce the pressure of the reaction
increase the pressure of the reaction
remove NH3
increase the temperature
add a catalyst
In which of the following situations would the energy of a system have to increase?
the system is hot compared to its surroundings
the system loses more energy than it gains
the system gains more energy than it loses
the system is expanding
If a reaction is endothermic
the system is losing energy
the system is gaining energy
the universe is losing energy
the universe is gaining energy
Complete this sentence: Atomic radius ____ from left to right across a period and ____ from top to bottom down a group on the periodic table.
increases, decreases
increases, increases
decreases, decreases
decreases, increases
Complete this sentence: Ionization energy ____ from left to right across a period and ____ from top to bottom down a group on the periodic table.
increases, decreases
increases, increases
decreases, decreases
decreases, increases
Complete this sentence: Metallic character ____ from left to right across a period and ____ from top to bottom down a group on the periodic table.
increases, decreases
increases, increases
decreases, decreases
decreases, increases
Complete this sentence: Electronegativity ____ from left to right across a period and ____ from top to bottom down a group on the periodic table.
increases, decreases
increases, increases
decreases, decreases
decreases, increases
Complete this sentence: Electron affinity ____ from left to right across a period and ____ from top to bottom down a group on the periodic table.
increases, decreases
increases, increases
decreases, decreases
decreases, increases
