Reaction Rate and Equilibrium Practice

A catalyst works by

• changing the order of the reaction
• increasing the temperature
• lowering the activation energy
• making the activated complex

What is the rate exponent for A?

• 0
• 1
• 2

Tags

NGSS.HS-PS1-5

Which trials would be used to measure the rate exponent for A?

• trials 1 and 2
• trials 1 and 3
• trials 2 and 3

Tags

NGSS.HS-PS1-5

The following data were measured for the reaction BF3(g) + NH3(g) —> F3BNH3(g)

What is the rate law for the reaction? 

• R=K[NH₃]

• R=K[BF₃]²[NH₃]

• R=K[BF₃][NH₃]

• R=K[BF₃][NH₃]²

Tags

NGSS.HS-PS1-5

Grinding a seltzer tablet into powder increases the rate of reaction due to increased

• concentration
• surface area
• temperature
• reactants

Why does a higher temperature increase the rate of a reaction?

• it increases the speed and energy of particles so they will collide more often

• It is hotter so it is faster

• it only increases the energy of particle collisions
• it reduces the activation energy of the reaction

Tags

NGSS.HS-PS1-5

Why does a higher concentration increase the rate of reaction?

• it increases the reaction rate

• it lowers the activation energy
• it increases the energy of particle collisions
• it increases the number of particles so more collisions can occur.

Tags

NGSS.HS-PS1-5

At what time (in seconds) is equilibrium established?

• 0 seconds
• 1 second
• 4 seconds

• 9 seconds

For the reaction...
SO_2(g) + O_2(g) <−>  SO_3(g)
If the concentration of SO_2(g)  is increased, the equilibrium of the reaction will ___________.

• shift to the left
• shift to the right
• not shift

Tags

NGSS.HS-PS1-5

This is the equilibrium expression for which of the following reactions?

• 2 N + 2 H3 <----> 3 NH2

• 2 NH3 <----> N2 + 3 H2

• N2 + 3 H2 <----> 2 NH3

• N2 + H3 <----> NH2

Tags

NGSS.HS-PS1-5