Chemistry Kinetics

Which conditions are required for the reaction between two molecules?

I. a collision

II. E ≥ E_a

III. proper orientation

• I and II only

• I and III only

• II and III only

• I, II and III

Tags

NGSS.HS-PS1-4

calcium carbonate is added to hydrochloric acid. Which graph represents the production of carbon dioxide when excess calcium carbonate is added to the same volume of hydrochloric acid of double concentration?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-5

The graph shows the Maxwell–Boltzmann energy distribution curve for a given gas at a certain temperature.

• The maximum is higher and to the left of A.

• The maximum is higher and to the right of A.

• The maximum is lower and to the right of A.

• The maximum is lower and to the left of A.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

Which properties can be monitored to determine the rate of the reaction?

• I and II only

• I and III only

• II and III only

• I, II and III

Tags

NGSS.HS-PS1-5

Which will increase the rate of reaction between calcium carbonate and hydrochloric acid?

• I and II only

• I and III only

• II and III only

• I, II and III

Tags

NGSS.HS-PS1-5

The same amount of two gases, X and Y, are in two identical containers at the same temperature. What is the difference between the gases?

• X has the higher molar mass.

• Y has the higher molar mass.

• X has the higher average kinetic energy.

• Y has the higher average kinetic energy.

Tags

NGSS.HS-PS3-2

Several reactions of calcium carbonate with dilute hydrochloric acid are carried out at the same temperature. Which reaction has the greatest rate?

• Concentration of HCl - HIGHER; Surface area of same mass of CaCO₃ (s) - LARGER

• Concentration of HCl - LOWER; Surface area of same mass of CaCO₃ (s) - SMALLER

• Concentration of HCl - LOWER; Surface area of same mass of CaCO₃ (s) - LARGER

• Concentration of HCl - HIGHER; Surface area of same mass of CaCO₃ (s) - SMALLER

Tags

NGSS.HS-PS1-5

The dotted line represents the formation of oxygen, O₂ (g), from the uncatalysed complete decomposition of hydrogen peroxide, H₂O₂ (aq). Which curve represents a catalysed reaction under the same conditions?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

What is the activation energy of the reverse reaction?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4

Which change increases the rate of formation of hydrogen when zinc reacts with excess hydrochloric acid, assuming all other conditions remain the same? Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)

• Adding water to the hydrochloric acid

• Decreasing the temperature

• Increasing the volume of hydrochloric acid

• Decreasing the size of the zinc particles while keeping the total mass of zinc the same

Tags

NGSS.HS-PS1-5