Review: Thermochemistry/Equilibrium

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(undefined = 1, undefined = 5)

• 1
• 2
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• 5

Which of the following describes activation energy

• the amount of energy required to start a chemical reaction
• the amount of energy produced in a chemical reaction
• the amount of energy released when bonds are formed

SO2 + O2 <−> SO3 If the concentration of SO2 is increased, the equilibrium of the reaction will______

• shift right (toward products)
• shift left (toward reactants)

True or False: Changing the concentration can impact the direction of a reaction

• True
• False

Which reaction requires less energy?

• Pathway 1
• Pathway 2

As a hot cup of coffee sits out on a cold day, which answer best explains what happens to the heat

• The cold table and the cold air cools the cup of coffee until it is room temperature
• The heat from the coffee leaves the coffee cup to the surroundings
• The temperature stays the same only the heat increases

NH3 is crucial for fertilizers. NH3 if produced from the following reaction. In order to make more NH3, what changes can be done to shift the equilibrium to the right to make more NH3 (select 3)

• Decrease H2
• Decrease NH3
• Increase NH3
• Increase N2
• decrease the temperature

Heat always flows from --- objects to --- objects.

• colder to warmer
• warmer to colder
• cooler to colder
• warm to warmer