Kinetics & Thermodynamics

Which of the following increase the reaction rate?

• less surface area

• lower temperature

• increasing pressure

• increased concentration

Tags

NGSS.HS-PS1-5

Will grinding up a solid increase or decrease the rate of reaction?

• increase
• decrease

Tags

NGSS.HS-PS1-5

In an exothermic reaction, heat is ...

• a reactant

• a product

Tags

NGSS.HS-PS3-1

What kind of reaction is this?

• Endothermic
• Exothermic
• Cannot be determined

Tags

NGSS.HS-PS1-4

__________ is stored energy. 

• Potential
• Kinetic
• None of the above 
• All of the above 

Tags

NGSS.MS-PS3-2

If ∆H is negative, the reaction is?

• exothermic
• endothermic

Tags

NGSS.HS-PS1-4

ΔH value in an endothermic reaction is a positive number.

• True
• False

Tags

NGSS.HS-PS3-1

Temperature is a measure of average ______ energy of individual atoms.

• heat
• potential
• mechanical
• kinetic

Which phase of matter has the greatest motion and least orderly arrangement?

• solid
• liquid
• gas

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A catalyst works by

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